Revert "ipv4: fix memory leaks in ip_cmsg_send() callers"

This reverts commit 91948309.

There is only when ip_options_get() return zero need to free.
It already called kfree() when return error.

Fixes: 91948309 ("ipv4: fix memory leaks in ip_cmsg_send() callers")
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>