Merge pull request #5735 from matrix-org/travis/use-strict-no

Remove a bunch of useless 'use strict' definitions

src/components/structures/EmbeddedPage.js

@@ -16,8 +16,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-'use strict';
-
 import React from 'react';
 import PropTypes from 'prop-types';
 import request from 'browser-request';