fix GW-1596

src/client/styles/scss/theme/_apply-colors.scss

@@ -32,9 +32,6 @@ $link-hover-color: $color-link-hover;
     color: $color-dropdown-link-active;
     background-color: $bgcolor-dropdown-link-active;
   }
-  &:hover:not(.active) {
-    color: $color-dropdown-link-hover;
-  }
 }
 
 // Form

src/client/styles/scss/theme/default.scss

@@ -43,7 +43,6 @@ html[light] {
   // Dropdown colors
   $bgcolor-dropdown-link-active: $growi-blue;
   $color-dropdown-link-active: $color-reversal;
-  $color-dropdown-link-hover: $color-global;
 
   @import 'apply-colors';
   @import 'apply-colors-light';