openvpn: removed obsolete code for building plugins

Note:

Starting with openvpn 2.3.0 there seem to be changes how plugins are enabled
and there are configure switches now for disabling the shipped plugins.

network/openvpn/openvpn.conf

@@ -12,29 +12,6 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
-plugin_libdir="${libdir}/openvpn"
-
-plugins_enabled=''
-
-build_plugin() {
-	local plugin=$1; shift
-
-	echo "Building openvpn plugin $plugin..."
-	cd plugin/$plugin
-
-	eval $MAKE $makeopt
-	cp *.so ${root}${plugin_libdir}
-
-	cd ../..
-}
-
-build_plugins() {
-	install -d ${root}${plugin_libdir}
-	for plugin in $plugins_enabled; do 
-		build_plugin $plugin
-	done
-}
-
 # allow passwords to be read from a file
 var_append confopt ' ' "--enable-password-save"
 
@@ -56,9 +33,3 @@ fi
 if ! pkginstalled -f pam; then
 	var_append extraconfopt ' ' "--disable-plugin-auth-pam"
 fi
-
-# build plugins when $plugins_enabled is not empty
-if [ ! -z "$plugins_enabled" ]; then
-	echo_warning "Enabling OpenVPN plugins: $plugins_enabled"
-	hook_add postmake 3 build_plugins
-fi