Remove PHP_CS_FIXER_IGNORE_ENV from fixcs script

Author: vudaltsov

composer.json

@@ -54,7 +54,7 @@
     },
     "scripts": {
         "analyse-deps": "tools/composer-dependency-analyser/vendor/bin/composer-dependency-analyser",
-        "fixcs": "PHP_CS_FIXER_IGNORE_ENV=1 tools/php-cs-fixer/vendor/bin/php-cs-fixer fix --diff --verbose",
+        "fixcs": "tools/php-cs-fixer/vendor/bin/php-cs-fixer fix --diff --verbose",
         "infection": "tools/infection/vendor/bin/infection --show-mutations",
         "normalize": "@composer bin composer-normalize normalize --diff ../../composer.json",
         "phpstan": "tools/phpstan/vendor/bin/phpstan analyze",