php: Don't generate any locales for tests

They're not needed any more due to the use of ipl-i18n

.github/workflows/php.yml

@@ -105,9 +105,7 @@ jobs:
           extensions: mysql, pgsql, ldap
 
       - name: Setup dependencies
-        run: |
-          sudo locale-gen en_US.UTF-8 de_DE.UTF-8 fr_FR.UTF-8
-          composer require -n --no-progress mockery/mockery ipl/i18n:@dev
+        run: composer require -n --no-progress mockery/mockery ipl/i18n:@dev
 
       - name: PHPUnit
         env: