Fix microsoft#162046 (microsoft#162209)

Author: sandy081

src/vs/workbench/browser/parts/activitybar/media/activityaction.css

@@ -184,7 +184,6 @@
 	justify-content: center;
 	align-items: center;
 	font-size: 14px;
-	line-height: 16px;
 	border-radius: 8px;
 }