Remove the unused variable introduced by 14916a52bd80.
Fixes: 14916a52bd80 ("af_vsock: separate receive data loop") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>