chore(transformers): remove reflector parameter from initReflector signature

Remove reflector parameter from initReflector method to simplify ng_deps for reflection
initialization. It wasn't used and was added for testability, but wasn't used. This
keeps the interface simplier.

modules/angular2/src/transform/reflection_remover/codegen.dart

@@ -53,8 +53,7 @@ class Codegen {
 
     var count = 0;
     return importUris
-        .map((_) =>
-            '${prefix}${count++}.${SETUP_METHOD_NAME}(${reflectorExpression});')
+        .map((_) => '${prefix}${count++}.${SETUP_METHOD_NAME}();')
         .join('');
   }
 }