Removed unused import

Author: mgamis-msft

packages/react-components/src/components/VideoGallery.tsx

@@ -2,7 +2,7 @@
 // Licensed under the MIT license.
 
 import { concatStyleSets, ContextualMenu, IDragOptions, IStyle, mergeStyles, Modal, Stack } from '@fluentui/react';
-import React, { useCallback, useEffect, useMemo, useRef } from 'react';
+import React, { useCallback, useMemo, useRef } from 'react';
 import { GridLayoutStyles } from '.';
 import { smartDominantSpeakerParticipants } from '../gallery';
 import { useIdentifiers } from '../identifiers/IdentifierProvider';