Remove deprecated features at React v15.5 (#1905)

* Remove deprecated features at React v15.5

- [x] React.PropTypes
- [x] react-addons-pure-render-mixin
- [x] react-addons-test-utils

* Uncommented out & Add browserify_rails options

* re-add react-addons-shallow

* Fix syntax error from resolve conflicts

* follow up 59a77923b3

app/assets/javascripts/components/features/account_timeline/index.jsx

@@ -1,6 +1,6 @@
 import { connect } from 'react-redux';
-import PureRenderMixin from 'react-addons-pure-render-mixin';
 import ImmutablePropTypes from 'react-immutable-proptypes';
+import PropTypes from 'prop-types';
 import {
   fetchAccount,
   fetchAccountTimeline,
@@ -20,36 +20,30 @@ const mapStateToProps = (state, props) => ({
   me: state.getIn(['meta', 'me'])
 });
 
-const AccountTimeline = React.createClass({
+class AccountTimeline extends React.PureComponent {
 
-  propTypes: {
-    params: React.PropTypes.object.isRequired,
-    dispatch: React.PropTypes.func.isRequired,
-    statusIds: ImmutablePropTypes.list,
-    isLoading: React.PropTypes.bool,
-    hasMore: React.PropTypes.bool,
-    me: React.PropTypes.number.isRequired
-  },
-
-  mixins: [PureRenderMixin],
+  constructor (props, context) {
+    super(props, context);
+    this.handleScrollToBottom = this.handleScrollToBottom.bind(this);
+  }
 
   componentWillMount () {
     this.props.dispatch(fetchAccount(Number(this.props.params.accountId)));
     this.props.dispatch(fetchAccountTimeline(Number(this.props.params.accountId)));
-  },
+  }
 
   componentWillReceiveProps(nextProps) {
     if (nextProps.params.accountId !== this.props.params.accountId && nextProps.params.accountId) {
       this.props.dispatch(fetchAccount(Number(nextProps.params.accountId)));
       this.props.dispatch(fetchAccountTimeline(Number(nextProps.params.accountId)));
     }
-  },
+  }
 
   handleScrollToBottom () {
     if (!this.props.isLoading && this.props.hasMore) {
       this.props.dispatch(expandAccountTimeline(Number(this.props.params.accountId)));
     }
-  },
+  }
 
   render () {
     const { statusIds, isLoading, hasMore, me } = this.props;
@@ -78,6 +72,15 @@ const AccountTimeline = React.createClass({
     );
   }
 
-});
+}
+
+AccountTimeline.propTypes = {
+  params: PropTypes.object.isRequired,
+  dispatch: PropTypes.func.isRequired,
+  statusIds: ImmutablePropTypes.list,
+  isLoading: PropTypes.bool,
+  hasMore: PropTypes.bool,
+  me: PropTypes.number.isRequired
+};
 
 export default connect(mapStateToProps)(AccountTimeline);