chore: remove superfluous build variants

.evergreen/config.yml

@@ -747,108 +747,12 @@ tasks:
         vars:
           VERSION: latest
 buildvariants:
-  - name: debian71-test-boron
-    display_name: Debian 7.1 Node Boron
-    run_on: debian71-test
-    expansions:
-      NODE_LTS_NAME: boron
-    tasks: &ref_0
-      - test-3.6-server
-      - test-3.6-replica_set
-      - test-3.6-sharded_cluster
-      - test-3.6-server-unified
-      - test-3.6-replica_set-unified
-      - test-3.6-sharded_cluster-unified
-      - test-3.4-server
-      - test-3.4-replica_set
-      - test-3.4-sharded_cluster
-      - test-3.4-server-unified
-      - test-3.4-replica_set-unified
-      - test-3.4-sharded_cluster-unified
-      - test-3.2-server
-      - test-3.2-replica_set
-      - test-3.2-sharded_cluster
-      - test-3.2-server-unified
-      - test-3.2-replica_set-unified
-      - test-3.2-sharded_cluster-unified
-      - test-3.0-server
-      - test-3.0-replica_set
-      - test-3.0-sharded_cluster
-      - test-3.0-server-unified
-      - test-3.0-replica_set-unified
-      - test-3.0-sharded_cluster-unified
-      - test-2.6-server
-      - test-2.6-replica_set
-      - test-2.6-sharded_cluster
-      - test-2.6-server-unified
-      - test-2.6-replica_set-unified
-      - test-2.6-sharded_cluster-unified
-  - name: debian71-test-argon
-    display_name: Debian 7.1 Node Argon
-    run_on: debian71-test
-    expansions:
-      NODE_LTS_NAME: argon
-    tasks: *ref_0
-  - name: debian81-test-dubnium
-    display_name: Debian 8.1 Node Dubnium
-    run_on: debian81-test
-    expansions:
-      NODE_LTS_NAME: dubnium
-    tasks: &ref_1
-      - test-4.0-server
-      - test-4.0-replica_set
-      - test-4.0-sharded_cluster
-      - test-4.0-server-unified
-      - test-4.0-replica_set-unified
-      - test-4.0-sharded_cluster-unified
-      - test-3.6-server
-      - test-3.6-replica_set
-      - test-3.6-sharded_cluster
-      - test-3.6-server-unified
-      - test-3.6-replica_set-unified
-      - test-3.6-sharded_cluster-unified
-      - test-3.4-server
-      - test-3.4-replica_set
-      - test-3.4-sharded_cluster
-      - test-3.4-server-unified
-      - test-3.4-replica_set-unified
-      - test-3.4-sharded_cluster-unified
-  - name: debian81-test-carbon
-    display_name: Debian 8.1 Node Carbon
-    run_on: debian81-test
-    expansions:
-      NODE_LTS_NAME: carbon
-    tasks: *ref_1
-  - name: debian81-test-boron
-    display_name: Debian 8.1 Node Boron
-    run_on: debian81-test
-    expansions:
-      NODE_LTS_NAME: boron
-    tasks: *ref_1
-  - name: debian81-test-argon
-    display_name: Debian 8.1 Node Argon
-    run_on: debian81-test
-    expansions:
-      NODE_LTS_NAME: argon
-    tasks: *ref_1
-  - name: linux-64-amzn-test-boron
-    display_name: Amazon Linux (Enterprise) Node Boron
-    run_on: linux-64-amzn-test
-    expansions:
-      NODE_LTS_NAME: boron
-    tasks: *ref_0
-  - name: linux-64-amzn-test-argon
-    display_name: Amazon Linux (Enterprise) Node Argon
-    run_on: linux-64-amzn-test
-    expansions:
-      NODE_LTS_NAME: argon
-    tasks: *ref_0
   - name: macos-1014-dubnium
     display_name: macOS 10.14 Node Dubnium
     run_on: macos-1014
     expansions:
       NODE_LTS_NAME: dubnium
-    tasks: &ref_2
+    tasks: &ref_0
       - test-latest-server
       - test-latest-replica_set
       - test-latest-sharded_cluster
@@ -903,110 +807,49 @@ buildvariants:
     run_on: macos-1014
     expansions:
       NODE_LTS_NAME: carbon
-    tasks: *ref_2
+    tasks: *ref_0
   - name: macos-1014-boron
     display_name: macOS 10.14 Node Boron
     run_on: macos-1014
     expansions:
       NODE_LTS_NAME: boron
-    tasks: *ref_2
+    tasks: *ref_0
   - name: macos-1014-argon
     display_name: macOS 10.14 Node Argon
     run_on: macos-1014
     expansions:
       NODE_LTS_NAME: argon
-    tasks: *ref_2
+    tasks: *ref_0
   - name: rhel70-dubnium
     display_name: RHEL 7.0 Node Dubnium
     run_on: rhel70-small
     expansions:
       NODE_LTS_NAME: dubnium
-    tasks: *ref_2
+    tasks: *ref_0
   - name: rhel70-carbon
     display_name: RHEL 7.0 Node Carbon
     run_on: rhel70-small
     expansions:
       NODE_LTS_NAME: carbon
-    tasks: *ref_2
+    tasks: *ref_0
   - name: rhel70-boron
     display_name: RHEL 7.0 Node Boron
     run_on: rhel70-small
     expansions:
       NODE_LTS_NAME: boron
-    tasks: *ref_2
+    tasks: *ref_0
   - name: rhel70-argon
     display_name: RHEL 7.0 Node Argon
     run_on: rhel70-small
     expansions:
       NODE_LTS_NAME: argon
-    tasks: *ref_2
-  - name: suse12-x86-64-test-dubnium
-    display_name: SUSE 12 (x86_64) Node Dubnium
-    run_on: suse12-test
-    expansions:
-      NODE_LTS_NAME: dubnium
-    tasks: &ref_3
-      - test-latest-server
-      - test-latest-replica_set
-      - test-latest-sharded_cluster
-      - test-latest-server-unified
-      - test-latest-replica_set-unified
-      - test-latest-sharded_cluster-unified
-      - test-4.2-server
-      - test-4.2-replica_set
-      - test-4.2-sharded_cluster
-      - test-4.2-server-unified
-      - test-4.2-replica_set-unified
-      - test-4.2-sharded_cluster-unified
-      - test-4.0-server
-      - test-4.0-replica_set
-      - test-4.0-sharded_cluster
-      - test-4.0-server-unified
-      - test-4.0-replica_set-unified
-      - test-4.0-sharded_cluster-unified
-      - test-3.6-server
-      - test-3.6-replica_set
-      - test-3.6-sharded_cluster
-      - test-3.6-server-unified
-      - test-3.6-replica_set-unified
-      - test-3.6-sharded_cluster-unified
-      - test-3.4-server
-      - test-3.4-replica_set
-      - test-3.4-sharded_cluster
-      - test-3.4-server-unified
-      - test-3.4-replica_set-unified
-      - test-3.4-sharded_cluster-unified
-      - test-3.2-server
-      - test-3.2-replica_set
-      - test-3.2-sharded_cluster
-      - test-3.2-server-unified
-      - test-3.2-replica_set-unified
-      - test-3.2-sharded_cluster-unified
-      - test-atlas-connectivity
-  - name: suse12-x86-64-test-carbon
-    display_name: SUSE 12 (x86_64) Node Carbon
-    run_on: suse12-test
-    expansions:
-      NODE_LTS_NAME: carbon
-    tasks: *ref_3
-  - name: suse12-x86-64-test-boron
-    display_name: SUSE 12 (x86_64) Node Boron
-    run_on: suse12-test
-    expansions:
-      NODE_LTS_NAME: boron
-    tasks: *ref_3
-  - name: suse12-x86-64-test-argon
-    display_name: SUSE 12 (x86_64) Node Argon
-    run_on: suse12-test
-    expansions:
-      NODE_LTS_NAME: argon
-    tasks: *ref_3
+    tasks: *ref_0
   - name: ubuntu-14.04-dubnium
     display_name: Ubuntu 14.04 Node Dubnium
     run_on: ubuntu1404-test
     expansions:
       NODE_LTS_NAME: dubnium
-    tasks: &ref_4
+    tasks: &ref_1
       - test-4.0-server
       - test-4.0-replica_set
       - test-4.0-sharded_cluster
@@ -1048,37 +891,81 @@ buildvariants:
     run_on: ubuntu1404-test
     expansions:
       NODE_LTS_NAME: carbon
-    tasks: *ref_4
+    tasks: *ref_1
   - name: ubuntu-14.04-boron
     display_name: Ubuntu 14.04 Node Boron
     run_on: ubuntu1404-test
     expansions:
       NODE_LTS_NAME: boron
-    tasks: *ref_4
+    tasks: *ref_1
   - name: ubuntu-14.04-argon
     display_name: Ubuntu 14.04 Node Argon
     run_on: ubuntu1404-test
     expansions:
       NODE_LTS_NAME: argon
-    tasks: *ref_4
-  - name: ubuntu-16.04-dubnium
-    display_name: Ubuntu 16.04 Node Dubnium
-    run_on: ubuntu1604-test
+    tasks: *ref_1
+  - name: ubuntu-18.04-dubnium
+    display_name: Ubuntu 18.04 Node Dubnium
+    run_on: ubuntu1804-test
     expansions:
       NODE_LTS_NAME: dubnium
       CLIENT_ENCRYPTION: true
-    tasks: *ref_3
-  - name: ubuntu-16.04-carbon
-    display_name: Ubuntu 16.04 Node Carbon
-    run_on: ubuntu1604-test
+    tasks: &ref_2
+      - test-latest-server
+      - test-latest-replica_set
+      - test-latest-sharded_cluster
+      - test-latest-server-unified
+      - test-latest-replica_set-unified
+      - test-latest-sharded_cluster-unified
+      - test-4.2-server
+      - test-4.2-replica_set
+      - test-4.2-sharded_cluster
+      - test-4.2-server-unified
+      - test-4.2-replica_set-unified
+      - test-4.2-sharded_cluster-unified
+      - test-4.0-server
+      - test-4.0-replica_set
+      - test-4.0-sharded_cluster
+      - test-4.0-server-unified
+      - test-4.0-replica_set-unified
+      - test-4.0-sharded_cluster-unified
+      - test-3.6-server
+      - test-3.6-replica_set
+      - test-3.6-sharded_cluster
+      - test-3.6-server-unified
+      - test-3.6-replica_set-unified
+      - test-3.6-sharded_cluster-unified
+      - test-3.4-server
+      - test-3.4-replica_set
+      - test-3.4-sharded_cluster
+      - test-3.4-server-unified
+      - test-3.4-replica_set-unified
+      - test-3.4-sharded_cluster-unified
+      - test-3.2-server
+      - test-3.2-replica_set
+      - test-3.2-sharded_cluster
+      - test-3.2-server-unified
+      - test-3.2-replica_set-unified
+      - test-3.2-sharded_cluster-unified
+      - test-atlas-connectivity
+  - name: ubuntu-18.04-carbon
+    display_name: Ubuntu 18.04 Node Carbon
+    run_on: ubuntu1804-test
     expansions:
       NODE_LTS_NAME: carbon
       CLIENT_ENCRYPTION: true
-    tasks: *ref_3
-  - name: ubuntu-16.04-boron
-    display_name: Ubuntu 16.04 Node Boron
-    run_on: ubuntu1604-test
+    tasks: *ref_2
+  - name: ubuntu-18.04-boron
+    display_name: Ubuntu 18.04 Node Boron
+    run_on: ubuntu1804-test
     expansions:
       NODE_LTS_NAME: boron
       CLIENT_ENCRYPTION: true
-    tasks: *ref_3
+    tasks: *ref_2
+  - name: ubuntu-18.04-argon
+    display_name: Ubuntu 18.04 Node Argon
+    run_on: ubuntu1804-test
+    expansions:
+      NODE_LTS_NAME: argon
+      CLIENT_ENCRYPTION: true
+    tasks: *ref_2

.evergreen/generate_evergreen_tasks.js

@@ -14,62 +14,29 @@ const TOPOLOGIES = ['server', 'replica_set', 'sharded_cluster'].concat([
 ]);
 
 const OPERATING_SYSTEMS = [
-  // Debian
-  {
-    name: 'debian71-test',
-    display_name: 'Debian 7.1',
-    run_on: 'debian71-test',
-    mongoVersion: '<4.0',
-    nodeVersions: ['argon', 'boron']
-  },
-  {
-    name: 'debian81-test',
-    display_name: 'Debian 8.1',
-    run_on: 'debian81-test',
-    mongoVersion: '>=3.4 <4.2'
-  },
-  // Amazon Linux
-  {
-    name: 'linux-64-amzn-test',
-    display_name: 'Amazon Linux (Enterprise)',
-    run_on: 'linux-64-amzn-test',
-    mongoVersion: '<4.0',
-    nodeVersions: ['argon', 'boron']
-  },
-  // macos
   {
     name: 'macos-1014',
     display_name: 'macOS 10.14',
     run_on: 'macos-1014',
     auth: false
   },
-  // rhel
   {
     name: 'rhel70',
     display_name: 'RHEL 7.0',
     run_on: 'rhel70-small'
   },
-  //suse
-  {
-    name: 'suse12-x86-64-test',
-    display_name: 'SUSE 12 (x86_64)',
-    run_on: 'suse12-test',
-    mongoVersion: '>=3.2'
-  },
-  // Ubuntu
   {
     name: 'ubuntu-14.04',
     display_name: 'Ubuntu 14.04',
     run_on: 'ubuntu1404-test',
     mongoVersion: '<4.2'
   },
   {
-    name: 'ubuntu-16.04',
-    display_name: 'Ubuntu 16.04',
-    run_on: 'ubuntu1604-test',
+    name: 'ubuntu-18.04',
+    display_name: 'Ubuntu 18.04',
+    run_on: 'ubuntu1804-test',
     mongoVersion: '>=3.2',
-    clientEncryption: true,
-    nodeVersions: ['dubnium', 'carbon', 'boron']
+    clientEncryption: true
   },
 
   // Windows. reenable this when nvm supports windows, or we settle on an alternative tool