Merge branch 'jivanvl-remove-append-bottom-4' into 'master'

Remove append-bottom-4 CSS class

See merge request gitlab-org/gitlab!34564

app/assets/stylesheets/framework/common.scss

@@ -420,7 +420,6 @@ img.emoji {
 .append-right-32 { margin-right: 32px; }
 .append-right-48 { margin-right: 48px; }
 .prepend-right-32 { margin-right: 32px; }
-.append-bottom-4 { margin-bottom: $gl-padding-4; }
 .append-bottom-5 { margin-bottom: 5px; }
 .append-bottom-10 { margin-bottom: 10px; }
 .append-bottom-15 { margin-bottom: 15px; }