Remove TODO about possible array body in runHttpQuery

I don't think this TODO is necessary. `runHttpQuery` is only called
in the event that `httpRequest.body` is not an array from the
`runPotentiallyBatchedHttpQuery` function. These are both private
API.

In the event that we do pass a batched body for some reason, we'll
still get an error, it just won't be quite as helpful as we'd want.

packages/server/src/runHttpQuery.ts

@@ -125,7 +125,6 @@ export async function runHttpQuery<TContext extends BaseContext>(
 
  switch (httpRequest.method) {
  case 'POST': {
- // TODO(AS4): If it's an array, some error about enabling batching?
  if (!isNonEmptyStringRecord(httpRequest.body)) {
  throw new BadRequestError(
  'POST body missing, invalid Content-Type, or JSON object has no keys.',