packages/luainterpreter: remove target-finalize hack

Use LUAINTERPRETER_TARGET_FINALIZE_HOOKS, now that it's suported by
virtual packages.

Signed-off-by: Carlos Santos <unixmania@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Arnout: don't remove relevant comment]

package/luainterpreter/luainterpreter.mk

@@ -7,15 +7,11 @@
 LUAINTERPRETER_ABIVER = $(call qstrip,$(BR2_PACKAGE_LUAINTERPRETER_ABI_VERSION))
 
 # Lua packages often install documentation, clean that up globally
-# Since luainterpreter is a virtual package, we can't use
-# LUAINTERPRETER_TARGET_FINALIZE_HOOKS
-ifeq ($(BR2_PACKAGE_HAS_LUAINTERPRETER),y)
 define LUAINTERPRETER_REMOVE_DOC
 	rm -rf $(TARGET_DIR)/usr/share/lua/$(LUAINTERPRETER_ABIVER)/doc
 endef
 
-TARGET_FINALIZE_HOOKS += LUAINTERPRETER_REMOVE_DOC
-endif
+LUAINTERPRETER_TARGET_FINALIZE_HOOKS += LUAINTERPRETER_REMOVE_DOC
 
 $(eval $(virtual-package))
 $(eval $(host-virtual-package))