Remove specific files declaration from sass-lint config
Remove specific files declaration from sass-lint config

Listing the files prevents tests from automatically working with
ember-cli-sass-lint.

dartajax/frontend,gabycampagna/frontend,ilios/frontend,thecoolestguy/frontend,jrjohnson/frontend,thecoolestguy/frontend,djvoa12/frontend,gboushey/frontend,ilios/frontend,djvoa12/frontend,dartajax/frontend,gabycampagna/frontend,gboushey/frontend,jrjohnson/frontend