local themes should be added to git repo

Author: torhoehn

.gitignore

@@ -33,7 +33,6 @@ atlassian*
 /.php_cs
 /.php_cs.cache
 /grunt-config.json
-/dev/tools/grunt/configs/local-themes.js
 /pub/media/*.*
 !/pub/media/.htaccess
 /pub/media/attribute/*