removed non-existent sass extends from LMS: .table-wrapper, .dullify, .trans, .problem-set

common/lib/xmodule/xmodule/css/video/display.scss

@@ -83,7 +83,6 @@ div.video {
       }
 
       ul.vcr {
-        @extend .dullify;
         float: left;
         list-style: none;
         margin: 0 lh() 0 0;
@@ -144,7 +143,6 @@ div.video {
       }
 
       div.secondary-controls {
-        @extend .dullify;
         float: right;
 
         div.speeds {
@@ -470,7 +468,6 @@ div.video {
   }
 
   &.closed {
-    @extend .trans;
 
     article.video-wrapper {
       width: flex-grid(9,9);

common/lib/xmodule/xmodule/css/videoalpha/display.scss

@@ -83,7 +83,6 @@ div.video {
       }
 
       ul.vcr {
-        @extend .dullify;
         float: left;
         list-style: none;
         margin: 0 lh() 0 0;
@@ -144,7 +143,6 @@ div.video {
       }
 
       div.secondary-controls {
-        @extend .dullify;
         float: right;
 
         div.speeds {
@@ -470,7 +468,6 @@ div.video {
   }
 
   &.closed {
-    @extend .trans;
 
     article.video-wrapper {
       width: flex-grid(9,9);

lms/static/sass/course/_gradebook.scss

@@ -2,7 +2,6 @@ $cell-border-color: #e1e1e1;
 $table-border-color: #c8c8c8;
 
 div.gradebook-wrapper {
-  @extend .table-wrapper;
 
   section.gradebook-content {
     @extend .content;

lms/static/sass/course/_info.scss

 div.info-wrapper {
-  @extend .table-wrapper;
 
   section.updates {
     @extend .content;

lms/static/sass/course/_profile.scss

 div.profile-wrapper {
-  @extend .table-wrapper;
   color: #000;
 
   section.user-info {

lms/static/sass/course/_textbook.scss

 div.book-wrapper {
-  @extend .table-wrapper;
   display: table;
   table-layout:  fixed;
-  padding: 1em 8em; 
+  padding: 1em 8em;
 
 
   #open_close_accordion {
@@ -45,7 +44,7 @@ div.book-wrapper {
       li {
         background: none;
         border-bottom: 0;
-        padding-left: lh();       
+        padding-left: lh();
 
         a {
           padding: 0;
@@ -62,7 +61,7 @@ div.book-wrapper {
 
         div.hitarea {
           background-image: url('../images/treeview-default.gif');
-          
+
           position: relative;
           top: 4px;
 
@@ -175,10 +174,10 @@ div.book-wrapper {
         text-align: left;
       	line-height: 1.6em;
       	margin: 5px;
-	
+
 	.Paragraph, h2 {
 	   margin-top: 10px;
-	}	   
+	}
       }
     }
   }

lms/static/sass/course/courseware/_courseware.scss

@@ -4,7 +4,6 @@ html {
 }
 
 div.course-wrapper {
-  @extend .table-wrapper;
 
   section.course-content {
     @extend .content;
@@ -47,7 +46,6 @@ div.course-wrapper {
 
       > li {
         @extend .clearfix;
-        @extend .problem-set;
         border-bottom: 1px solid #ddd;
         margin-bottom: 15px;
         padding: 0 0 15px;

lms/static/sass/course/instructor/_instructor.scss

 .instructor-dashboard-wrapper {
-	@extend .table-wrapper;
 	display: table;
 
 	section.instructor-dashboard-content {