services: kmscon: Remove virtual-terminal requirement.

kmscon does not require that virtual terminals run in UTF-8 mode.

* gnu/services/base.scm (kmscon-service-type): Remove virtual-terminal from
requirement list.

gnu/services/base.scm

@@ -2138,7 +2138,7 @@ This service is not part of @var{%base-services}."
 
        (shepherd-service
         (documentation "kmscon virtual terminal")
-        (requirement '(user-processes udev dbus-system virtual-terminal))
+        (requirement '(user-processes udev dbus-system))
         (provision (list (symbol-append 'term- (string->symbol virtual-terminal))))
         (start #~(make-forkexec-constructor #$kmscon-command))
         (stop #~(make-kill-destructor)))))))