Remove obsolete css styles

viewer/latexworkshop.css

-@media all and (max-width: 1100px) {
-    #toolbarViewerMiddle {
-      display: table;
-      margin: auto;
-      left: auto;
-      position: inherit;
-      -webkit-transform: none;
-              transform: none;
-    }
-}
-
-@media all and (max-width: 660px) {
-    .visibleSmallView {
-      display: inherit;
-    }
-}
-
 .visibleLargeView,
 .visibleMediumView,
 .visibleMediumView + .horizontalToolbarSeparator {