__wikijs: remove uneeded npm install call

See https://github.com/Requarks/wiki/issues/1325.

type/__wikijs/gencode-remote

@@ -22,10 +22,5 @@ EOF
 # Install deps and launch
 cat << EOF
 cd /var/wiki || exit 1
-npm install
-EOF
-
-# Restart service.
-cat << EOF
 service wikijs restart
 EOF

type/__wikijs/manifest

@@ -52,7 +52,6 @@ export HTTP_PORT HTTPS_PORT
 db_pass="$(cat "${__object:?}/parameter/database-password")"
 
 __package nodejs
-__package npm
 __directory /var/wiki/
 
 # These things are Alpine-dependant.