Remove support for 'userlocks'?

According to our documentation, 'userlocks' were removed in PG 8.2:

http://developer.postgresql.org/pgdocs/postgres/runtime-config-developer.html

trace_userlocks (boolean)

If on, emit information about user lock usage. Output is the same as
for trace_locks, only for user locks.

User locks were removed as of PostgreSQL version 8.2. This option
currently has no effect.

This parameter is only available if the LOCK_DEBUG macro was defined
when PostgreSQL was compiled.

Should we remove this parameter and the supporting code since pre-8.2 is
now end-of-life?

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +