mosdns: drop GO_PKG_TARGET_VARS variable

mosdns/Makefile

@@ -36,8 +36,6 @@ define Package/mosdns
   DEPENDS:=$(GO_ARCH_DEPENDS) +ca-bundle
 endef
 
-GO_PKG_TARGET_VARS:=$(filter-out CGO_ENABLED=%,$(GO_PKG_TARGET_VARS)) CGO_ENABLED=0
-
 define Package/mosdns/install
 	$(call GoPackage/Package/Install/Bin,$(1))
 endef