message: remove creatApp from core-import test because of updated package resolution
diff: @@ -45,9 +45,8 @@ return something()
  it('should refactor imports', () => {
  const input = `
  /* COPYRIGHT: ME */
  -import { Button as MyButton, createApiRef, createApp } from '@backstage/core';
  +import { Button as MyButton, createApiRef } from '@backstage/core';
  -const app = createApp();
  const apiRef = createApiRef();
  const button = <MyButton />
  `;
  @@ -57,9 +56,7 @@ const button = <MyButton />
  import { Button as MyButton } from '@backstage/core-components';
  import { createApiRef } from '@backstage/core-plugin-api';
  -import { createApp } from '@backstage/core-app-api';
  -const app = createApp();
  const apiRef = createApiRef();
  const button = <MyButton />
  `;
  