Gallery: Remove CSS hover zoom in the mosaic view of Gallery.app.

Sometimes, zoomed image covers others. It doesn't look good.

BUG=393870
TEST=manually

Review URL: https://codereview.chromium.org/387313010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283688 0039d316-1c4b-4281-b951-d872f2087c98

ui/file_manager/gallery/css/gallery.css

@@ -1228,11 +1228,6 @@ body {
   outline-color: rgb(51, 153, 255);
 }
 
-.mosaic[visible='normal'].hover-visible .mosaic-tile:hover {
-  -webkit-transform: scale(1.05);
-  z-index: 50;
-}
-
 .mosaic[visible='normal'].hover-visible
     .mosaic-tile:hover:not([selected]) .img-border {
   outline-color: rgb(182, 212, 252);