Revert "contrib: enable libdsm"

- Misses the ifdef BUILD_NETWORK
 - Was enabled on system where other smb alternatives were present
 - Build failing on some Linux distributions

Packagers should enable it explicitly.

This reverts commit c5a852e6d0.
This reverts commit c7b275f1c9.

contrib/src/libdsm/rules.mak

@@ -4,9 +4,6 @@
 LIBDSM_VERSION := 0.2.8
 LIBDSM_URL := https://github.com/videolabs/libdsm/releases/download/v$(LIBDSM_VERSION)/libdsm-$(LIBDSM_VERSION).tar.gz
 
-ifndef HAVE_WIN32
-PKGS += libdsm
-endif
 ifeq ($(call need_pkg,"libdsm >= 0.2.0"),)
 PKGS_FOUND += libdsm
 endif