Remove empty block

src/webui/www/private/css/Layout.css

@@ -378,9 +378,6 @@ li.divider {
     text-align: right;
 }
 
-.panel-header-toolbox {
-}
-
 /* Have to specify div here for IE6's sake */
 div.toolbox.divider {
     background: url(../images/toolbox-divider.gif) repeat-y;

src/webui/www/private/css/Window.css

@@ -24,9 +24,6 @@ Required by:
     background-color: #e5e5e5;
 }
 
-.mocha.isFocused {
-}
-
 .mochaOverlay {
     position: absolute; /* This is also set in theme.js in order to make theme transitions smoother */
     top: 0;
@@ -180,12 +177,6 @@ div.mochaToolbarWrapper.bottom {
     margin-left: 0;
 }
 
-.mochaMaximizeButton {
-}
-
-.mochaCloseButton {
-}
-
 .mochaSpinner {
     display: none;
     position: absolute;