Remove redundant GK definition from flipper-common

Summary: Developers should use `getRenderHostInstance().GK(...)` instead

Reviewed By: lblasa

Differential Revision: D37034322

fbshipit-source-id: 41017f53a5256449252917a48fcd3a49a9b984c8

desktop/flipper-common/src/GK.tsx

@@ -1,14 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @format
- */
-
-export const GK = {
-  get(_name: string): boolean {
-    return false;
-  },
-};

desktop/flipper-common/src/index.tsx

@@ -58,7 +58,6 @@ export {
 export {createControlledPromise} from './utils/controlledPromise';
 export * from './utils/typeUtils';
 export * from './utils/uuid';
-export * from './GK';
 export * from './clientUtils';
 export * from './settings';
 export * from './PluginDetails';