fix tabs not being able to be "disabled"

src/components/tab_switcher/tab_switcher.scss

@@ -166,13 +166,6 @@
     position: relative;
     white-space: nowrap;
     padding: 6px 1em;
-    background-color: $fallback--fg;
-    background-color: var(--tab, $fallback--fg);
-
-    &, &:active .tab-icon {
-      color: $fallback--text;
-      color: var(--tabText, $fallback--text);
-    }
 
     &:not(.active) {
       z-index: 4;