CI: drop unused env variables

.github/workflows/ci.yml

@@ -30,9 +30,6 @@ jobs:
 
           - operating-system: 'ubuntu-20.04'
             php-version: '7.3'
-            job-description: 'with legacy Tokenizer' # should be checked on any job, one is enough
-            PHP_CS_FIXER_TEST_USE_LEGACY_TOKENIZER: 1
-            SYMFONY_DEPRECATIONS_HELPER: 'disabled'
 
           - operating-system: 'ubuntu-20.04'
             php-version: '7.4'
@@ -129,8 +126,6 @@ jobs:
         env:
           PHP_CS_FIXER_IGNORE_ENV: ${{ matrix.PHP_CS_FIXER_IGNORE_ENV }}
           FAST_LINT_TEST_CASES: ${{ matrix.FAST_LINT_TEST_CASES }}
-          PHP_CS_FIXER_TEST_USE_LEGACY_TOKENIZER: ${{ matrix.PHP_CS_FIXER_TEST_USE_LEGACY_TOKENIZER }}
-          SYMFONY_DEPRECATIONS_HELPER: ${{ matrix.SYMFONY_DEPRECATIONS_HELPER }}
         run: vendor/bin/phpunit ${{ matrix.phpunit-flags }}
 
       - name: Upload coverage results to Coveralls