Removed missing stylesheet reference.

Author: hackademix

src/ui/common.css

@@ -4,7 +4,6 @@
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 @import url(../common/themes.css);
-@import url(images.css);
 
 body {
   background-color: var(--bg-color2);