mesa: remove obsolete confdiff.sh

this script is obsolete since
0cc216676c

bin/confdiff.sh

@@ -1,48 +0,0 @@
-#!/bin/bash -e
-
-usage()
-{
-	echo "Usage: $0 <target1> <target2>"
-	echo "Highlight differences between Mesa configs"
-	echo "Example:"
-	echo "  $0 linux linux-x86"
-}
-
-die()
-{
-	echo "$@" >&2
-	return 1
-}
-
-case "$1" in
--h|--help) usage; exit 0;;
-esac
-
-[ $# -lt 2 ] && die 2 targets needed. See $0 --help
-target1=$1
-target2=$2
-
-topdir=$(cd "`dirname $0`"/..; pwd)
-cd "$topdir"
-
-[ -f "./configs/$target1" ] || die Missing configs/$target1
-[ -f "./configs/$target2" ] || die Missing configs/$target2
-
-trap 'rm -f "$t1" "$t2"' 0
-
-t1=$(mktemp)
-t2=$(mktemp)
-
-make -f- -n -p <<EOF | sed '/^# Not a target/,/^$/d' > $t1
-TOP = .
-include \$(TOP)/configs/$target1
-default:
-EOF
-
-make -f- -n -p <<EOF | sed '/^# Not a target/,/^$/d' > $t2
-TOP = .
-include \$(TOP)/configs/$target2
-default:
-EOF
-
-diff -pu -I'^#' $t1 $t2