Deprecate dmd userid provider (#6459)

Co-authored-by: mfitzgerald_dmd <mfitzgerald@dmdconnects.com>

Author: matthewfitz

dev-docs/modules/userid-submodules/dmd.md

@@ -6,8 +6,14 @@ useridmodule: dmdIdSystem
 bidRequestUserId: dmdId
 eidsource: hcn.health
 example: '"1111"'
+enable_download: false
 ---
 
+# NOTE: DMD HAS BEEN DEPRECATED
+
+# THIS MODULE NO LONGER FUNCTIONS AND WILL BE REMOVED FROM A
+
+# FUTURE VERSION OF PREBID
 
 DMD is the preeminent supplier of US-based healthcare professional (HCP) identity data to the pharmaceutical, health system and medical publishing industries. DMD is the only data provider that has acquired its deterministic identity data through a fully consented, first-party, opt-in process. DMD’s privacy policy that can be found at [Privacy Policy](https://hcn.health/privacy-policy).