Remove getTemplate stuff

According to @krisselden this is not needed, and `meta.moduleName` is already what we want. With that in mind, I am removing this stuff. Fixes emberjs#750

ember_debug/libs/glimmer-tree.js

@@ -354,9 +354,7 @@ export default class {
 
     if (!template) {
       let layout = component.get('layout');
-      if (layout) {
-        layout = this.getGlimmerEnvironment().getTemplate(layout);
-      } else {
+      if (!layout) {
         let componentName = component.get('_debugContainerKey');
         if (componentName) {
           let layoutName = componentName.replace(/component:/, 'template:components/');
@@ -553,16 +551,6 @@ export default class {
     }
   }
 
-  /**
-   * The glimmer environment is needed for looking up templates.
-   *
-   * @method getGlimmerEnvironment
-   * @return {Class} The glimmer environment
-   */
-  getGlimmerEnvironment() {
-    return this.container.lookup('service:-glimmer-environment');
-  }
-
   /**
    * Renders a rectangle around a component's element. This happens
    * when the user either hovers over the view tree components