Bug 1514300 - Remove unused defines in toolkit/themes/osx/global/shared.inc r=dao

Differential Revision: https://phabricator.services.mozilla.com/D16627

--HG--
extra : moz-landing-system : lando

toolkit/themes/osx/global/shared.inc

@@ -16,6 +16,3 @@
 %define scopeBarSeparatorBorder 1px solid #888
 %define scopeBarTitleColor #6D6D6D
 
-%define toolbarbuttonBackground linear-gradient(#FFF, #ADADAD) repeat-x
-%define toolbarbuttonPressedInnerShadow inset rgba(0, 0, 0, 0.3) 0 -6px 10px, inset #000 0 1px 3px, inset rgba(0, 0, 0, 0.2) 0 1px 3px
-%define toolbarbuttonInactiveBorderColor rgba(146, 146, 146, 0.84)