[type/__hostname] Remove opensuse-leap OS string

everything should be suse now…

cdist/conf/type/__hostname/gencode-remote

@@ -79,7 +79,7 @@ in
     (solaris)
         echo "uname -S '${name_should}'"
         ;;
-    (slackware|suse|opensuse-leap)
+    (slackware|suse)
         # We do not read from /etc/HOSTNAME, because the running
         # hostname is the first component only while the file contains
         # the FQDN.

cdist/conf/type/__hostname/manifest

@@ -42,7 +42,7 @@ else
             # Hostname is FQDN
             name_should=${__target_host:?}
             ;;
-        (suse|opensuse-leap)
+        (suse)
             name_should=${__target_host:?}
 
             # Classic SuSE stores the FQDN in /etc/HOSTNAME, while
@@ -157,7 +157,7 @@ in
     (solaris)
         echo "${name_should}" | __file /etc/nodename --source -
         ;;
-    (suse|opensuse-leap)
+    (suse)
         # Modern SuSE provides /etc/HOSTNAME as a symlink for
         # backwards-compatibility. Unfortunately it cannot be used
         # here as __file does not follow the symlink.