[Frontend] Very minor tweaks to bring open into parity with lastest scss from ue-frontend

WTD-1292
Tweaks prior to rebuild of ue-frontend branch;

platform/commonUI/general/res/sass/controls/_buttons.scss

@@ -148,14 +148,4 @@ a.btn span,
 a.l-btn,
 a.l-btn span {
 	display: inline-block;
-}
-
-.l-btn {
-	padding: 0 $pad;
-	&.sm {
-		padding: 0 $interiorMargin;
-	}
-	&.vsm {
-		padding: 0 $interiorMargin/2;
-	}
 }