chore: remove unused deps & ignored dev files

Author: Arif-un

composer.json

@@ -14,7 +14,8 @@
       ".gitignore",
       "lefthook.yml",
       ".php-cs-fixer.php",
-      "composer.lock"
+      "composer.lock",
+      ".vscode"
     ]
   },
   "require": {
@@ -24,8 +25,6 @@
     "friendsofphp/php-cs-fixer": "^3.10",
     "sirbrillig/phpcs-variable-analysis": "*",
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7",
-    "phpunit/phpunit": "^9.3.0",
-    "yoast/phpunit-polyfills": "^1.0",
     "phpcompatibility/phpcompatibility-wp": "*"
   },
   "autoload": {