remove symfony/polyfill-php80 since the sdk has it now

Author: carlalexander

composer.json

@@ -42,8 +42,7 @@
     "yoast/phpunit-polyfills": "^2.0",
     "phpstan/phpstan": "^1.10",
     "szepeviktor/phpstan-wordpress": "^1.3",
-    "php-stubs/wp-cli-stubs": "^2.8",
-    "symfony/polyfill-php80": "^1.29"
+    "php-stubs/wp-cli-stubs": "^2.8"
   },
   "scripts": {
     "format": "phpcbf --standard=phpcs.xml --report-summary --report-source",