Remove unused `useNativeQuery` util (#42384)

frontend/src/metabase/query_builder/components/view/NativeQueryPreview/index.ts

 export { NativeQueryPreview } from "./NativeQueryPreview";
-export { useNativeQuery } from "./use-native-query";

frontend/src/metabase/query_builder/components/view/NativeQueryPreview/use-native-query.ts

-import { getIn } from "icepick";
-import { useEffect, useState } from "react";
-
-import { formatNativeQuery } from "metabase/lib/engine";
-import type Question from "metabase-lib/v1/Question";
-import type { NativeQueryForm } from "metabase-types/api";
-
-interface UseNativeQuery {
-  query?: string;
-  error?: string;
-  isLoading: boolean;
-}
-
-export const useNativeQuery = (
-  question: Question,
-  getNativeQuery: () => Promise<NativeQueryForm>,
-) => {
-  const [state, setState] = useState<UseNativeQuery>({ isLoading: true });
-
-  useEffect(() => {
-    getNativeQuery()
-      .then(data =>
-        setState({ query: getQueryText(question, data), isLoading: false }),
-      )
-      .catch(error =>
-        setState({ error: getQueryError(error), isLoading: false }),
-      );
-  }, [question, getNativeQuery]);
-
-  return state;
-};
-
-const getQueryText = (question: Question, data: NativeQueryForm) => {
-  const engine = question.database()?.engine;
-  return formatNativeQuery(data.query, engine);
-};
-
-const getQueryError = (error: unknown): string | undefined => {
-  return getIn(error, ["data", "message"]);
-};