Merge pull request #4314 from matrix-org/travis/react-warnings/2-code-quality

Fix a number of minor code quality issues

src/components/structures/GroupView.js

@@ -433,7 +433,6 @@ export default createReactClass({
         this._matrixClient = MatrixClientPeg.get();
         this._matrixClient.on("Group.myMembership", this._onGroupMyMembership);
 
-        this._changeAvatarComponent = null;
         this._initGroupStore(this.props.groupId, true);
 
         this._dispatcherRef = dis.register(this._onAction);

src/components/structures/auth/SoftLogout.js

@@ -54,7 +54,7 @@ export default class SoftLogout extends React.Component {
 
         this.state = {
             loginView: LOGIN_VIEW.LOADING,
-            keyBackupNeeded: true, // assume we do while we figure it out (see componentWillMount)
+            keyBackupNeeded: true, // assume we do while we figure it out (see componentDidMount)
 
             busy: false,
             password: "",