php7-pecl-http: remove left-over backup directory

This directory was added by mistake in one of the last commits to
this package, just remove it, it's not needed.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

lang/php7-pecl-http/patches.old/100_config9-m4.patch

@@ -1,22 +0,0 @@
---- a/config9.m4	2016-09-08 21:39:18.000000000 +0200
-+++ b/config9.m4	2016-09-08 21:42:35.066903251 +0200
-@@ -71,18 +71,7 @@
- 		extname=$1
- 		haveext=$[PHP_]translit($1,a-z_-,A-Z__)
- 		AC_MSG_CHECKING([for ext/$extname support])
--		if test -x "$PHP_EXECUTABLE"; then
--			grepext=`$PHP_EXECUTABLE -m | $EGREP ^$extname\$`
--			if test "$grepext" = "$extname"; then
--				[PHP_HTTP_HAVE_EXT_]translit($1,a-z_-,A-Z__)=1
--				AC_MSG_RESULT([yes])
--				$2
--			else
--				[PHP_HTTP_HAVE_EXT_]translit($1,a-z_-,A-Z__)=
--				AC_MSG_RESULT([no])
--				$3
--			fi
--		elif test "$haveext" != "no" && test "x$haveext" != "x"; then
-+		if test "$haveext" != "no" && test "x$haveext" != "x"; then
- 			[PHP_HTTP_HAVE_EXT_]translit($1,a-z_-,A-Z__)=1
- 			AC_MSG_RESULT([yes])
- 			$2