refactor (variables-css): remove unused declarations

Author: firestar300

src/scss/03-base/_variables-css.scss

@@ -43,10 +43,6 @@
      */
     --wp-admin-bar-height: var(--wp-admin--admin-bar--height, 0rem);
 
-    .admin-bar {
-        --wp-admin-bar-height: var(--wp-admin--admin-bar--height, 46px);
-    }
-
     /*
      * Alignments breakpoints
      */
@@ -76,20 +72,11 @@
          */
         &:not(.scroll-top) {
             .admin-bar {
-                --wp-admin-bar-height: var(--wp-admin--admin-bar--height, 0rem);
+                --wp-admin-bar-height: 0px;
             }
         }
     }
 
-    @include breakpoints(admin-bar) {
-        /*
-         * Admin bar
-         */
-        .admin-bar {
-            --wp-admin-bar-height: var(--wp-admin--admin-bar--height, 32px);
-        }
-    }
-
     @include breakpoints(md) {
         /*
          * Spacing