[Examples] Move examples out of main.js

...such that they are not compiled into the Open MCT that
is used as the basis for non-example applications.

Addresses #835

main.js

@@ -89,11 +89,7 @@ define([
     './platform/entanglement/bundle',
     './platform/search/bundle',
     './platform/status/bundle',
-    './platform/commonUI/regions/bundle',
-
-    './example/imagery/bundle',
-    './example/eventGenerator/bundle',
-    './example/generator/bundle'
+    './platform/commonUI/regions/bundle'
 ], function (Main, legacyRegistry) {
     'use strict';
 
@@ -103,4 +99,4 @@ define([
             return new Main().run(legacyRegistry);
         }
     };
-});
+});