No need to save most label objects

src/js/parser/javascript/any_character.js

@@ -5,6 +5,6 @@ export default _.extend({}, Base, {
   type: 'any-character',
 
   _render() {
-    this.label = this.renderLabel('any character');
+    this.renderLabel('any character');
   }
 });

src/js/parser/javascript/base.js

@@ -65,9 +65,8 @@ export default {
 
     this.container.addClass('placeholder');
 
-    this.label = this.renderLabel(this.textValue);
-
-    this.label.select('rect').attr({
+    this.renderLabel(this.textValue)
+      .select('rect').attr({
         rx: 10,
         ry: 10
       });

src/js/parser/javascript/escape.js

@@ -13,9 +13,8 @@ export default _.extend({}, Base, {
   },
 
   _render() {
-    this.label = this.renderLabel(_.result(this, this.code()));
-
-    this.label.select('rect').attr({
+    this.renderLabel(_.result(this, this.code()))
+      .select('rect').attr({
         rx: 3,
         ry: 3
       });

src/js/parser/javascript/literal.js

@@ -5,9 +5,8 @@ export default _.extend({}, Base, {
   type: 'literal',
 
   _render() {
-    this.label = this.renderLabel('"' + this.literal.textValue + '"');
-
-    this.label.select('rect').attr({
+    this.renderLabel('"' + this.literal.textValue + '"')
+      .select('rect').attr({
         rx: 3,
         ry: 3
       });