Revert "libdbi-drivers: fixed to find mysql.h because since mysql >= 5.5 it gets installed into $includedir and not into $includedir/mysql"

This reverts commit 72df93a7a2.

database/libdbi-drivers/libdbi-drivers-0.8.3-1-mysql55-header.patch

@@ -1,27 +0,0 @@
-# --- SDE-COPYRIGHT-NOTE-BEGIN ---
-# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
-#
-# Filename: package/.../libdbi-drivers/libdbi-drivers-0.8.3-1-mysql55-header.patch
-# Copyright (C) 2011 The OpenSDE Project
-#
-# More information can be found in the files COPYING and README.
-#
-# This patch file is dual-licensed. It is available under the license the
-# patched project is licensed under, as long as it is an OpenSource license
-# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
-# of the GNU General Public License as published by the Free Software
-# Foundation; either version 2 of the License, or (at your option) any later
-# version.
-# --- SDE-COPYRIGHT-NOTE-END ---
-
---- libdbi-drivers-0.8.3-1/drivers/mysql/dbd_mysql.c.orig	2011-04-13 10:02:21.820077817 +0200
-+++ libdbi-drivers-0.8.3-1/drivers/mysql/dbd_mysql.c	2011-04-13 10:02:29.172077718 +0200
-@@ -51,7 +51,7 @@
- #include <dbi/dbi-dev.h>
- #include <dbi/dbd.h>
- 
--#include <mysql/mysql.h>
-+#include <mysql.h>
- #include "dbd_mysql.h"
- 
- static const dbi_info_t driver_info = {