fix: CI errors as the result of removing React imports (#29089)

superset-frontend/plugins/plugin-chart-echarts/src/Histogram/Histogram.tsx

@@ -16,7 +16,6 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-import React from 'react';
 import { HistogramTransformedProps } from './types';
 import Echart from '../components/Echart';
 import { EventHandlers } from '../types';