Drop mkdirhier

This is only used by nofib's dead `dist` target

mk/config.mk.in

@@ -387,8 +387,6 @@ SRC_HC_WARNING_OPTS_STAGE2 =
 # -----------------------------------------------------------------------------
 # Names of programs in the GHC tree
 
-MKDIRHIER           = $(INPLACE_BIN)/mkdirhier
-
 GENERATED_FILE  = chmod a-w
 EXECUTABLE_FILE = chmod +x
 

utils/mkdirhier/Makefile

-# -----------------------------------------------------------------------------
-#
-# (c) 2009 The University of Glasgow
-#
-# This file is part of the GHC build system.
-#
-# To understand how the build system works and how to modify it, see
-#      https://gitlab.haskell.org/ghc/ghc/wikis/building/architecture
-#      https://gitlab.haskell.org/ghc/ghc/wikis/building/modifying
-#
-# -----------------------------------------------------------------------------
-
-dir = utils/mkdirhier
-TOP = ../..
-include $(TOP)/mk/sub-makefile.mk

utils/mkdirhier/mkdirhier.sh

-#!/bin/sh
-
-mkdir -p ${1+"./$@"}
-