Stop freezing plugin messages

Reviewed By: lblasa

Differential Revision: D39600455

fbshipit-source-id: f829d135d4feb2a8000d094e3dad17b8b9d46cd3

desktop/flipper-frontend-core/src/AbstractClient.tsx

@@ -18,7 +18,6 @@ import {
 } from 'flipper-common';
 import EventEmitter from 'eventemitter3';
 import {getPluginKey} from './utils/pluginKey';
-import {freeze} from 'immer';
 import {
   timeout,
   ClientQuery,
@@ -240,7 +239,7 @@ export default abstract class AbstractClient extends EventEmitter {
 
     let rawData;
     try {
-      rawData = freeze(JSON.parse(msg), true);
+      rawData = JSON.parse(msg);
     } catch (err) {
       console.error(`Invalid JSON: ${msg}`, 'clientMessage');
       return;