We don't actually use this anywhere, so let's remove it.

https://github.com/facebook/react/blob/f1d00156df5453bc62bd5668fefdcac4ca67e90e/src/renderers/shared/fiber/ReactFiberScheduler.js#L1504-L1512
container: OpaqueRoot,
    ): React$Component<any, any> | PI | null {
      const containerFiber = container.current;
      if (!containerFiber.child) {
        return null;
      }
      switch (containerFiber.child.tag) {
        case HostComponent:
          return getPublicInstance(containerFiber.child.stateNode);
        default:
          return containerFiber.child.stateNode;
      }
    },
    findHostInstance(fiber: Fiber): PI | null {
      const hostFiber = findCurrentHostFiber(fiber);
      if (hostFiber === null) {
        return null;
      }
      return hostFiber.stateNode;
    },
    findHostInstanceWithNoPortals(fiber: Fiber): PI | null {
      const hostFiber = findCurrentHostFiberWithNoPortals(fiber);
      if (hostFiber === null) {
        return null;
      }
      return hostFiber.stateNode;
    },
  };
};