tcp: remove SG-related comment in tcp_sendmsg()

Since commit 74d4a8f8d3 ("tcp: remove sk_can_gso() use"), the code
doesn't care whether the interface supports SG.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/tcp.c

@@ -1274,9 +1274,6 @@ restart:
 			int linear;
 
 new_segment:
-			/* Allocate new segment. If the interface is SG,
-			 * allocate skb fitting to single page.
-			 */
 			if (!sk_stream_memory_free(sk))
 				goto wait_for_sndbuf;