removed debugging code

Former-commit-id: 8c6ed34a35952b912bc700790fb3dffb08b119f3

extension/ui/content/content-ui-editor-web.js

@@ -370,7 +370,6 @@
 	}
 
 	function onMouseUp(event) {
-		debugger
 		if (highlightSelectionMode) {
 			highlightSelection();
 		}