Fix import merge conflicts, removing any that aren't needed anymore

Many imports were removed as part of refactoring work, so here we are.

src/components/views/groups/GroupInviteTile.js

@@ -19,12 +19,7 @@ limitations under the License.
 import React from 'react';
 import PropTypes from 'prop-types';
 import createReactClass from 'create-react-class';
-<<<<<<< HEAD
-import { MatrixClient } from 'matrix-js-sdk';
 import * as sdk from '../../../index';
-=======
-import sdk from '../../../index';
->>>>>>> develop
 import dis from '../../../dispatcher';
 import {_t} from '../../../languageHandler';
 import classNames from 'classnames';