Merge branch 'remove-css-imports' into 'master'

Remove unneccessary imports

See merge request gitlab-org/gitlab-ce!18993

app/assets/stylesheets/pages/boards.scss

-@import './issues/issue_count_badge';
-
 [v-cloak] {
   display: none;
 }

app/assets/stylesheets/pages/issues.scss

-@import "./issues/issue_count_badge";
-
 .issues-list {
   .issue {
     padding: 10px 0 10px $gl-padding;