Remove plugins before copying them again.

This way plugins can rename/delete files w/o having old files lying around.

Makefile

@@ -15,6 +15,7 @@ install: dependencies stack copyfiles plugins version
 
 copyfiles:
 	cp dokku /usr/local/bin/dokku
+	rm -Rf /var/lib/dokku/plugins
 	mkdir -p /var/lib/dokku/plugins
 	cp -r plugins/* /var/lib/dokku/plugins
 

plugins/nginx-vhosts/commands

@@ -1,9 +0,0 @@
-#!/usr/bin/env bash
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
-
-case "$1" in
-  help)
-    cat
-    ;;
-esac
-