Drop Psalm

As per the decision we took during the hackathon.

.gitattributes

@@ -6,4 +6,3 @@
 /tests export-ignore
 /test_fixtures export-ignore
 /phpstan.neon export-ignore
-/psalm.xml export-ignore

.github/workflows/static-analysis.yml

@@ -9,7 +9,6 @@ on:
       - composer.*
       - lib/**
       - phpstan*
-      - psalm*
       - test_fixtures/**
       - tests/**
   push:
@@ -20,11 +19,10 @@ on:
       - composer.*
       - lib/**
       - phpstan*
-      - psalm*
       - test_fixtures/**
       - tests/**
 
 jobs:
   static-analysis:
     name: "Static Analysis"
-    uses: "doctrine/.github/.github/workflows/static-analysis.yml@3.0.0"
+    uses: "doctrine/.github/.github/workflows/phpstan.yml@6.0.0"

composer.json

@@ -12,9 +12,7 @@
         "phpstan/phpstan": "1.4.10 || 1.10.15",
         "phpstan/phpstan-phpunit": "^1.0",
         "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
-        "psalm/plugin-phpunit": "0.18.4",
-        "psr/log": "^1 || ^2 || ^3",
-        "vimeo/psalm": "4.30.0 || 5.12.0"
+        "psr/log": "^1 || ^2 || ^3"
     },
     "suggest": {
         "psr/log": "Allows logging deprecations via PSR-3 logger implementation"