Removed obsolete styles from InsightWindow.qss

src/Insight/UserInterfaces/InsightWindow/Stylesheets/InsightWindow.qss

@@ -12,67 +12,6 @@
     border-bottom: 1px solid #2F2F2D;
 }
 
-QMenuBar::item {
-    position: relative;
-    margin: 0;
-    top: 0;
-    padding-top: 0;
-    padding-bottom: 1px;
-    padding-right: 4px;
-    padding-left: 4px;
-    background-color: transparent;
-    float: left;
-    font-size: 14px;
-    border: none;
-}
-
-QMenuBar::item:pressed {
-    background-color: #355A80;
-}
-
-QMenuBar {
-    border: none;
-    margin: 0;
-    padding: 0;
-    min-height: 24px;
-    background-color: transparent;
-    spacing: 0;
-    color: #afb1b3;
-    font-size: 14px;
-}
-
-QMenu {
-    margin: 0;
-    padding: 0;
-    background-color: #373835;
-    color: #afb1b3;
-    border: 1px solid #41423f;
-    min-width: 200px;
-    font-size: 14px;
-}
-
-QMenu::item {
-    padding: 4px 5px 4px 25px;
-    min-width: 200px;
-}
-
-QMenu::item:selected {
-    background-color: #355A80;
-}
-
-QMenu::item:disabled {
-    color: #808484;
-}
-
-QMenu::separator {
-    border-top: 1px solid #41423f;
-    height: 1px;
-}
-
-QMenu#help-menu::separator {
-    margin: 1px 0;
-}
-
 #header-tool-bar {
     min-height: 27px;
     margin-left: 10px;