Remove cursor: pointer; (#21812)

* Remove most of custom cursor: pointer; implementations

* turns out that's not so much of a thing

scss/_close.scss

@@ -10,7 +10,6 @@
   @include hover-focus {
     color: $close-color;
     text-decoration: none;
-    cursor: pointer;
     opacity: .75;
   }
 }
@@ -23,7 +22,6 @@
 // scss-lint:disable QualifyingElement
 button.close {
   padding: 0;
-  cursor: pointer;
   background: transparent;
   border: 0;
   -webkit-appearance: none;