mptcp: remove the redundant assignment of 'new_ctx->tcp_sock' in subflow_ulp_clone()

The variable has already been assigned in the subflow_create_ctx(),
So we don't need to reassign this variable in the subflow_ulp_clone().

Signed-off-by: MoYuanhao <[email protected]>

Author: MoYuanhao

net/mptcp/subflow.c

@@ -2049,7 +2049,6 @@ static void subflow_ulp_clone(const struct request_sock *req,
 	new_ctx->tcp_state_change = old_ctx->tcp_state_change;
 	new_ctx->tcp_error_report = old_ctx->tcp_error_report;
 	new_ctx->rel_write_seq = 1;
-	new_ctx->tcp_sock = newsk;
 
 	if (subflow_req->mp_capable) {
 		/* see comments in subflow_syn_recv_sock(), MPTCP connection