[js] remove old code

lib/firebase.js

@@ -2,7 +2,7 @@
  * @providesModule Firebase
  * @flow
  */
-import { NativeModules, NativeEventEmitter } from 'react-native';
+import { NativeModules } from 'react-native';
 
 import Log from './utils/log';
 import { isObject } from './utils';
@@ -17,7 +17,6 @@ import Crash from './modules/crash';
 
 const instances = { default: null };
 const FirebaseModule = NativeModules.RNFirebase;
-const FirebaseModuleEvt = new NativeEventEmitter(FirebaseModule);
 
 /**
  * @class Firebase
@@ -59,30 +58,6 @@ export default class Firebase {
     this.database = this._staticsOrInstance('database', DatabaseStatics, Database);
   }
 
-  /**
-   *
-   * @param name
-   * @param statics
-   * @param InstanceClass
-   * @returns {function()}
-   * @private
-   */
-  _staticsOrInstance(name, statics, InstanceClass) {
-    const getInstance = () => {
-      const internalPropName = `_${name}`;
-
-      if (!this[internalPropName]) {
-        this[internalPropName] = new InstanceClass(this);
-      }
-
-      return this[internalPropName];
-    };
-
-    Object.assign(getInstance, statics || {});
-
-    return getInstance;
-  }
-
   /**
    * Support web version of initApp.
    * @param options
@@ -106,13 +81,6 @@ export default class Firebase {
     return instances[name];
   }
 
-
-  /**
-   * Wrappers
-   * We add methods from each wrapper to this instance
-   * when they are needed. Not sure if this is a good
-   * idea or not (imperative vs. direct manipulation/proxy)
-   */
   auth() {
     return this._auth;
   }
@@ -159,36 +127,26 @@ export default class Firebase {
   }
 
   /**
-   * Redux store
-   **/
-  get store(): ?Object {
-    return this._store;
-  }
-
-  get constants(): Object {
-    if (!this._constants) {
-      this._constants = Object.assign({}, Storage.constants);
-    }
-    return this._constants;
-  }
-
-  /**
-   * Global event handlers for the single Firebase instance
+   *
+   * @param name
+   * @param statics
+   * @param InstanceClass
+   * @returns {function()}
+   * @private
    */
-  on(name: string, cb: Function, nativeModule: Object = FirebaseModuleEvt) {
-    if (!this.eventHandlers[name]) {
-      this.eventHandlers[name] = [];
+  _staticsOrInstance(name, statics, InstanceClass) {
+    const getInstance = () => {
+      const internalPropName = `_${name}`;
+
+      if (!this[internalPropName]) {
+        this[internalPropName] = new InstanceClass(this);
       }
 
-    const sub = nativeModule.addListener(name, cb);
-    this.eventHandlers[name].push(sub);
-    return sub;
-  }
+      return this[internalPropName];
+    };
 
-  off(name: string) {
-    if (this.eventHandlers[name]) {
-      this.eventHandlers[name]
-        .forEach(subscription => subscription.remove());
-    }
+    Object.assign(getInstance, statics || {});
+
+    return getInstance;
   }
 }