Remove web domain check for webmail vhosts

In environments where the server only hosts the mail domain but not a matching web domain, the addition of webmail vhost configuration would fail.

bin/v-add-webmail

@@ -49,8 +49,6 @@ is_object_valid 'user' 'USER' "$user"
 is_object_unsuspended 'user' 'USER' "$user"
 is_object_valid 'mail' 'DOMAIN' "$domain"
 is_object_unsuspended 'mail' 'DOMAIN' "$domain"
-is_object_valid 'web' 'DOMAIN' "$domain"
-is_object_unsuspended 'web' 'DOMAIN' "$domain"
 
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