Remove ComponentLabelView hotfix for the tagName

src/dom_components/view/ComponentLabelView.ts

@@ -1,7 +1,3 @@
 import ComponentLinkView from './ComponentLinkView';
 
-export default class ComponentLabelView extends ComponentLinkView {
+export default class ComponentLabelView extends ComponentLinkView {}
-  tagName() {
-    return 'span';
-  } // Avoid Firefox bug with label editing #2332
-}