tools: Remove unused munge-postgres-logs.

This hasn't been used in several years.

tools/munge-postgres-logs

@@ -1,11 +0,0 @@
-#!/usr/bin/perl
-use strict;
-use warnings;
-
-while (<>) {
-  # remove milliseconds
-  s/(?<= \d\d:\d\d:\d\d)\.\d{3}//;
-  # convert session id to process id
-  s/\[[0-9a-zA-Z]+\.([0-9a-zA-Z]+)\]/"[" . hex($1) . "]"/e;
-  print;
-}