added some style for the courseware headers

sass/courseware/_courseware.scss

@@ -12,6 +12,11 @@ div.course-wrapper {
   section.course-content {
     @extend .content;
 
+    h1 {
+      @extend .top-header;
+      background: none;
+    }
+
     p {
       margin-bottom: lh();
 

sass/courseware/_sidebar.scss

@@ -22,7 +22,6 @@ section.course-index {
       right: -1px;
       border: 1px solid #D3D3D3;
       background: #eee url('/static/images/slide-left-icon.png') center center no-repeat;
-      @include box-shadow(inset 0 0 0 1px #fff);
       @include border-radius(3px 0 0 3px);
 
       &:hover {