Remove default plugin entrypoints for hot-reloading

Summary: As we stopped bundling plugins in D39276249, we no longer need the entry points for the bundled plugins (these entry points are always going to be empty)

Reviewed By: lblasa

Differential Revision: D39307565

fbshipit-source-id: 43751fe31c8bd962677c226b27cfe52093d3f2d4

desktop/flipper-server-companion/src/initializeRenderHost.tsx

@@ -46,7 +46,6 @@ export function initializeRenderHost(
     restartFlipper() {
       // TODO:
     },
-    loadDefaultPlugins: () => ({}),
     serverConfig: flipperServerConfig,
     GK(gatekeeper) {
       return flipperServerConfig.gatekeepers[gatekeeper] ?? false;