chore(pre-commit): remove files from pre-commit config

Allow client repositories to customise

Author: dcs3spp

.pre-commit-hooks.yaml

@@ -2,7 +2,6 @@
     name: Validate GitLab CI
     description: This hook validates the Gitlab CI yaml file
     entry: validate-ci
-    files: '.gitlab-ci.yaml'
     language: ruby
     language_version: 2.6.3
     types: [executable, file, ruby, text]