fix _apply-colors-light.scss

packages/preset-themes/src/styles/theme/_apply-colors-light.scss

@@ -24,7 +24,6 @@ $color-dropdown-link: var(--color-dropdown-link,var(--color-global));
 $color-dropdown-link-hover: var(--color-dropdown-link-hover,var(--color-global));
 $color-dropdown-link-active: var(--color-reversal);
 $bgcolor-dropdown-link-active: $primary !default;
-$bgcolor-navbar: var(--bgcolor-navbar,#{$gray-900});
 
 
 // override bootstrap variables