chore: update react imports

Signed-off-by: Paul Schultz <pschultz@pobox.com>

packages/integration-react/dev/DevPage.tsx

@@ -16,7 +16,6 @@
 
 import { ScmIntegration, ScmIntegrationsGroup } from '@backstage/integration';
 import Typography from '@material-ui/core/Typography';
-import React from 'react';
 import { scmIntegrationsApiRef } from '../src/ScmIntegrationsApi';
 
 import { Content } from '@backstage/core-components';

packages/integration-react/dev/index.tsx

@@ -15,7 +15,6 @@
  */
 import { createDevApp } from '@backstage/dev-utils';
 import { ScmIntegrations } from '@backstage/integration';
-import React from 'react';
 import { scmIntegrationsApiRef } from '../src/ScmIntegrationsApi';
 import { DevPage } from './DevPage';
 import { configApiRef, createApiFactory } from '@backstage/core-plugin-api';