delete unused file

Change-Id: I15ad0f30859a3133993f0a75ed0d09bb5ef9cdf5
Reviewed-by: Jonas Rabbe <jonas.rabbe@gmail.com>

config.tests/tools/which.test

@@ -1,40 +0,0 @@
-#!/bin/sh
-#borrowed from Qt
-
-HOME=/dev/null
-export HOME
-
-unset which
-
-WHICH=`which which 2>/dev/null`
-if echo $WHICH | grep 'shell built-in command' >/dev/null 2>&1; then
-    WHICH=which
-elif [ -z "$WHICH" ]; then
-    if which which >/dev/null 2>&1; then
-	WHICH=which
-    else
-	for a in /usr/ucb /usr/bin /bin /usr/local/bin; do
-	    if [ -x $a/which ]; then
-		WHICH=$a/which
-		break;
-	    fi
-	done
-    fi
-fi
-
-if [ -z "$WHICH" ]; then
-    IFS=:
-    for a in $PATH; do
-	if [ -x $a/$1 ]; then
-	    echo "$a/$1"
-	    exit 0
-	fi
-    done
-else
-    a=`"$WHICH" "$1" 2>/dev/null`
-    if [ ! -z "$a" -a -x "$a" ]; then
-	echo "$a"
-	exit 0
-    fi
-fi
-exit 1