Issue #2421385 by mortendk: shortcut cssfile cleanup

core/modules/shortcut/css/shortcut.icons.theme.css

@@ -21,6 +21,8 @@
   background: transparent url(../images/favstar.svg) no-repeat left top;
   width: 20px;
   height: 20px;
+  display: inline-block;
+  vertical-align: -2px;
 }
 [dir="rtl"] .add-or-remove-shortcuts .icon {
   background-image: url(../images/favstar-rtl.svg);

core/modules/shortcut/css/shortcut.module.css

-/**
- * @file
- * Generic base styles for shortcut module.
- */
-
-/**
- * Add/remove links.
- */
-.add-or-remove-shortcuts .icon {
-  display: inline-block;
-  vertical-align: -2px;
-}

core/modules/shortcut/shortcut.libraries.yml

 drupal.shortcut:
   version: VERSION
   css:
-    component:
-      css/shortcut.module.css: {}
     theme:
       css/shortcut.theme.css: {}
       css/shortcut.icons.theme.css: {}