Remove C plugin support until deferred mode is supported by OpenVPN

Makefile

@@ -1,21 +1,13 @@
-CC		:= gcc
-CFLAGS	:=
-LDFLAGS	:= -fPIC -shared
 INSTALL	:= install
 DESTDIR	:= /
 PREFIX	:= /usr
 
-all: plugin
-
-plugin: netfilter_openvpn.c
-	$(CC) $(CFLAGS) $(LDFLAGS) -I. -c netfilter_openvpn.c
-	$(CC) $(CFLAGS) $(LDFLAGS) -Wl,-soname,netfilter_openvpn.so -o netfilter_openvpn.so netfilter_openvpn.o
+all: 
 
 install: plugin
 	mkdir -p $(DESTDIR)$(PREFIX)/lib/openvpn/plugins
 	mkdir -p $(DESTDIR)/etc/openvpn
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
-	$(INSTALL) -m755 netfilter_openvpn.so $(DESTDIR)$(PREFIX)/lib/openvpn/plugins
 	$(INSTALL) -m755 netfilter_openvpn.py $(DESTDIR)$(PREFIX)/lib/openvpn/plugins
 	$(INSTALL) -m600 netfilter_openvpn.conf.inc $(DESTDIR)/etc/netfilter_openvpn.conf
 	$(INSTALL) -m755 scripts/vpn-fw-find-user.sh $(DESTDIR)$(PREFIX)/bin