revert _navbar.scss

src/client/styles/scss/_navbar.scss

@@ -1,10 +1,6 @@
 .grw-navbar {
   top: -$grw-navbar-height !important;
 
-  &.grw-navbar-for-old-ios {
-    top: initial !important;
-  }
-
   max-height: $grw-navbar-height + $grw-navbar-border-width;
   border-top: 0;
   border-right: 0;