Remove find_lt sgml tool, as it is not needed.

Per suggestion from Peter.

src/tools/RELEASE_CHANGES

@@ -44,7 +44,6 @@ For Major Releases
 	o document all new features
 	o update help output from inside the programs
 	o doc/src/sgml/ref manual pages
-	o convert any literal "<" and ">" characters, use tools/find_lt
 	o update the sizes specified for installation requirements
 	  (doc/src/sgml/installation.sgml, section "install-requirements")
 	o update the shared memory size requirement table

src/tools/find_lt

@@ -1,6 +0,0 @@
-#!/bin/sh
-
-# src/tools/find_lt
-# SGML is fine with ">"
-
-grep "$@" '<[^]a-z0-9"/!-]' *.sgml ref/*.sgml