tcon can not be null in SMB2_tcon function so the check
is not relevant and removing it makes Coverity happy.
Acked-by: NRonnie Sahlberg <lsahlber@redhat.com>
Addresses-Coverity: 13250131 ("Dereference before null check")
Signed-off-by: NSteve French <stfrench@microsoft.com>