Removin immutable as a dependency

package.json

@@ -13,7 +13,6 @@
     "coverage": "istanbul cover --report lcov _mocha --require ./node_modules/react-native-mock/mock.js --require src/test/testHelper.js $(find ./src/test -name '*Test.js')"
   },
   "dependencies": {
-    "immutable": "^3.8.1",
     "invariant": "^2.2.2",
     "lodash": "^4.12.0",
     "moment": "^2.15.1",

src/js/framework/view/AbstractComponent.js

@@ -1,12 +1,11 @@
 import React, {Component} from 'react';
 import {ActivityIndicator, StyleSheet, Alert} from 'react-native';
-import {Map} from 'immutable';
 
 class AbstractComponent extends Component {
     constructor(props, context) {
         super(props, context);
         this.renderComponent = this.renderComponent.bind(this);
-        this.spinnerDefaults = Map({color: 'white', size: 'small'});
+        this.spinnerDefaults = Map([["color", 'white'], ["size", 'small']]);
         this.showError = this.showError.bind(this);
     }
 

src/js/views/assessment/Toolbar.js

@@ -5,7 +5,6 @@ import PrimaryColors from "../styles/PrimaryColors";
 import Typography from "../styles/Typography";
 import Actions from '../../action';
 import {Icon} from 'native-base';
-import {comp} from 'immutable';
 import _ from 'lodash';