rnnoise: simplify initialization

package-lock.json

       }
     },
     "rnnoise-wasm": {
-      "version": "github:jitsi/rnnoise-wasm#db96d11f175a22ef56c7db1ba9550835b716e615",
-      "from": "github:jitsi/rnnoise-wasm#db96d11f175a22ef56c7db1ba9550835b716e615"
+      "version": "github:jitsi/rnnoise-wasm#566a16885897704d6e6d67a1d5ac5d39781db2af",
+      "from": "github:jitsi/rnnoise-wasm#566a16885897704d6e6d67a1d5ac5d39781db2af"
     },
     "rsvp": {
       "version": "4.8.5",

package.json

     "react-transition-group": "2.4.0",
     "redux": "4.0.4",
     "redux-thunk": "2.2.0",
-    "rnnoise-wasm": "github:jitsi/rnnoise-wasm.git#db96d11f175a22ef56c7db1ba9550835b716e615",
+    "rnnoise-wasm": "github:jitsi/rnnoise-wasm.git#566a16885897704d6e6d67a1d5ac5d39781db2af",
     "styled-components": "3.4.9",
     "util": "0.12.1",
     "uuid": "3.1.0",

react/features/stream-effects/rnnoise/index.js

 export { RNNOISE_SAMPLE_LENGTH } from './RnnoiseProcessor';
 export type { RnnoiseProcessor };
 
-let rnnoiseWasmInterface;
-let initializePromise;
+let rnnoiseModule;
 
 /**
  * Creates a new instance of RnnoiseProcessor.
  * @returns {Promise<RnnoiseProcessor>}
  */
 export function createRnnoiseProcessor() {
-    if (!initializePromise) {
-        initializePromise = new Promise((resolve, reject) => {
-            rnnoiseWasmInterface = rnnoiseWasmInit({
-                onRuntimeInitialized() {
-                    resolve();
-                },
-                onAbort(reason) {
-                    reject(reason);
-                }
-            });
-        });
+    if (!rnnoiseModule) {
+        rnnoiseModule = rnnoiseWasmInit();
     }
 
-    return initializePromise.then(
-        () => new RnnoiseProcessor(rnnoiseWasmInterface)
-    );
+    return rnnoiseModule.then(mod => new RnnoiseProcessor(mod));
 }

webpack.config.js

         entry: {
             'rnnoise-processor': './react/features/stream-effects/rnnoise/index.js'
         },
-        node: {
-            // Emscripten generated glue code "rnnoise.js" expects node fs module,
-            // we need to specify this parameter so webpack knows how to properly
-            // interpret it when encountered.
-            fs: 'empty'
-        },
         output: Object.assign({}, config.output, {
             library: [ 'JitsiMeetJS', 'app', 'effects', 'rnnoise' ],
             libraryTarget: 'window',