Remove @smtp_host_parts variable as not used.

Signed-off-by: Pascal Obry <pascal@obry.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-send-email.perl

@@ -189,7 +189,7 @@ sub do_edit {
 # Variables with corresponding config settings
 my ($thread, $chain_reply_to, $suppress_from, $signed_off_by_cc, $cc_cmd);
 my ($smtp_server, $smtp_server_port, $smtp_authuser, $smtp_encryption);
-my ($identity, $aliasfiletype, @alias_files, @smtp_host_parts, $smtp_domain);
+my ($identity, $aliasfiletype, @alias_files, $smtp_domain);
 my ($validate, $confirm);
 my (@suppress_cc);
 my ($auto_8bit_encoding);