lint: remove duplicate / stale rules from .eslintrc

.eslintrc.yaml

@@ -2,28 +2,10 @@ env:
   node: true
   es6: true
   mocha: true
-  es2020: true
+  es2022: true
 
-plugins:
-  - haraka
-
-extends:
-  - eslint:recommended
-  - plugin:haraka/recommended
-
-root: true
+extends: '@haraka'
 
 rules:
-  no-var: warn
-  space-before-function-paren: warn
-  no-shadow: warn
-  dot-notation: warn
   indent: warn
-
-globals:
-  OK: true
-  CONT: true
-  DENY: true
-  DENYSOFT: true
-  DENYDISCONNECT: true
-  DENYSOFTDISCONNECT: true
+  no-unused-vars: 0

index.js

@@ -23,14 +23,14 @@ exports.handle_authn = function (next, connection, params) {
     if (!connection.notes.authenticating) return next();
 
     switch (connection.notes.auth_method) {
-        case AUTH_METHOD_LOGIN:
-            this.auth_login(next, connection, params);
-            break;
-        case AUTH_METHOD_PLAIN:
-            this.auth_plain(next, connection, params);
-            break;
-        default:
-            next();
+    case AUTH_METHOD_LOGIN:
+        this.auth_login(next, connection, params);
+        break;
+    case AUTH_METHOD_PLAIN:
+        this.auth_plain(next, connection, params);
+        break;
+    default:
+        next();
     }
 }