diff --git a/build/mkdep.os390 b/build/mkdep.os390
deleted file mode 100644
index 257b2e681b157a84e5c36169de2cb651996ad5ab..0000000000000000000000000000000000000000
--- a/build/mkdep.os390
+++ /dev/null
@@ -1,43 +0,0 @@
-#! /bin/sh
-# $OpenLDAP$
-## Copyright 2002 The OpenLDAP Foundation
-## COPYING RESTRICTIONS APPLY.  See COPYRIGHT File in top level directory
-## of this package for details.
-#
-# use the preprocessor, parse #line directives...
-#
-# The _C89_ELINES env var tells c89 to generate #line directives. It only
-# generates them for files that actually contribute non-whitespace. Since
-# portable.h is mostly #defines, it preprocesses to blanks, and causes no
-# #line directive to be emitted for it.
-#
-# We work around this with the -C flag which says to preserve comments. 
-# With this flag, all files generate non-blank output, so all header files
-# are included in the output. Because we depend on comments, every file
-# must have a comment on its first line to get accurate results.
-# 
-_C89_ELINES=1
-export _C89_ELINES
-FLAGS=""
-FILES=""
-for i in $*; do
-	case $i in
-	-*)	FLAGS="$FLAGS $i" ;;
-	*)	FILES="$FILES $i" ;;
-	esac
-done
-for i in $FILES; do
-	c89 -CE $FLAGS $i | egrep '^#line.*"' | awk '
-BEGIN {
-	file = "'$i'"
-	n = split(file, parts, "/")
-	filenm = substr(parts[n], 0, length(parts[n])-1) "o"
-}
-{
-	dep = split($3, parts, "\"")
-	dep = parts[2]
-	if (dep ~ "^\./.*") dep = substr(dep, 3, length(dep)-2)
-	if (deps[dep] == 0) printf "%s: %s\n", filenm, dep
-	deps[dep] = 1
-}'
-done