Send deinit message even if the plugin runs in background

Summary: Put back deinit message and send deinit call even if the plugin is the background one

Reviewed By: danielbuechele

Differential Revision: D10300165

fbshipit-source-id: ef945282fe628e9196c21b5060a8e464e98bc94c

src/plugin.js

@@ -165,10 +165,6 @@ export class FlipperPlugin<S = *, A = *, P = *> extends FlipperBasePlugin<
   }
 
   _teardown() {
-    if (this.constructor.persistedStateReducer) {
-      // do not tear down when persistedStateReducer is set
-      return;
-    }
     // automatically unsubscribe subscriptions
     for (const {method, callback} of this.subscriptions) {
       this.realClient.unsubscribe(this.constructor.id, method, callback);