Merge pull request #907 from edx/valera/fix_remove_unnecessary_css_code_from_video

Removed an inclusion of t-copy-sub1 in SCSS for Video.

common/lib/xmodule/xmodule/css/tabs/tabs.scss

@@ -32,7 +32,6 @@
 
     //Component Name
     .component-name {
-      @extend .t-copy-sub1;
       position: relative;
       top: 0;
       left: 0;