remove unnecessary export keyword

Author: dwickern

blueprints/ember-cli-typescript/files/app/config/environment.d.ts

@@ -8,8 +8,8 @@ export default config;
  * since different ember addons can materialize new entries.
  */
 declare namespace config {
-  export var environment: any;
-  export var modulePrefix: string;
-  export var podModulePrefix: string;
-  export var locationType: string;
+  var environment: any;
+  var modulePrefix: string;
+  var podModulePrefix: string;
+  var locationType: string;
 }