NetworkPkg/TcpDxe: Remove the status check of SockProcessRcvToken

NetworkPkg/TcpDxe: Remove the status check of SockProcessRcvToken

SockProcessRcvToken only returns the number of the received bytes, not
an EFI Status.

Cc: "Siyuan Fu" <siyuan.fu@intel.com>
Cc: "Jiaxin Wu" <jiaxin.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Samer El-Haj-Mahmoud <elhaj@hpe.com>
Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com>
Reviewed-by: Siyuan Fu <siyuan.fu@intel.com>