Revert "code_samples.yaml: Ignore baseline issues"

This reverts commit 06c34f6.

Author: adriendupuis

.github/workflows/code_samples.yaml

@@ -82,12 +82,6 @@ jobs:
               with:
                   dependency-versions: highest
 
-            - if: matrix.php == '7.4'
-              id: phpstan-unmatched
-              name: Don't report unmatched ignored errors
-              run: |
-                  echo '    reportUnmatchedIgnoredErrors: false' >> phpstan.neon
-
             - name: Run PHPStan analysis
               id: phpstan
               continue-on-error: true