Remove "available in version" comment

Author: PabloKowalczyk

symfony/webpack-encore-bundle/1.6/config/packages/webpack_encore.yaml

@@ -21,6 +21,5 @@ webpack_encore:
     # frontend: '%kernel.project_dir%/public/frontend/build'
 
     # Cache the entrypoints.json (rebuild Symfony's cache when entrypoints.json changes)
-    # Available in version 1.2
     # Put in config/packages/prod/webpack_encore.yaml
     # cache: true