Function
remove-header-pending
Removes all response headers of the given name from a pending response.
This will also remove any changes previously queued via insert-header-pending
or append-header-pending for the same header name.
The target argument controls under which conditions this header is applied.
remove-header-pending: func(pending: borrow<pending-response>, name: string, target: pending-response-kind) -> result<_, error>;