Bug 1747423 - Remove the @buttonState* preprocessor %defines; remove vars from (macos only) .panel-buttons r=amy

Differential Revision: https://phabricator.services.mozilla.com/D137349

browser/themes/osx/customizableui/panelUI.css

@@ -80,11 +80,11 @@ menu.subviewbutton > .menu-right {
   padding: 2px 6px;
 }
 
-.panel-button@buttonStateHover@ {
+.panel-button:not([disabled]):hover {
   background-color: var(--panel-item-hover-bgcolor);
 }
 
-.panel-button@buttonStateActive@ {
+.panel-button:not([disabled]):hover:active {
   background-color: var(--panel-item-active-bgcolor);
 }
 

browser/themes/shared/customizableui/panelUI.inc.css

@@ -4,9 +4,7 @@
 
 %filter substitution
 
-%define buttonStateHover :not([disabled],[open],:active):is(:hover)
 %define menuStateHover :not([disabled],:active)[_moz-menuactive]
-%define buttonStateActive :not([disabled]):is([open],:hover:active)
 %define menuStateActive :not([disabled])[_moz-menuactive]:active
 %define menuStateMenuActive :not([disabled])[_moz-menuactive]
 %define inAnyPanel :is(:not([cui-areatype="toolbar"]), [overflowedItem=true])