tdf#42949 Fix IWYU warnings in opencl/

Found with bin/find-unneeded-includes
Only removal proposals are dealt with here.

Change-Id: I0aedc40c49c8cb1382f45571f54873d6017ec62c
Reviewed-on: https://gerrit.libreoffice.org/72637
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

opencl/IwyuFilter_opencl.yaml

+---
+assumeFilename: opencl/source/opencl_device.cxx
+blacklist:
+    opencl/source/opencl_device.cxx:
+    # Avoid loplugin:unreffun error
+    - opencl_device.hxx

opencl/inc/opencl_device.hxx

@@ -10,9 +10,10 @@
 #ifndef INCLUDED_OPENCL_INC_OPENCL_DEVICE_HXX
 #define INCLUDED_OPENCL_INC_OPENCL_DEVICE_HXX
 
-#include <opencl/openclwrapper.hxx>
+#include <rtl/ustring.hxx>
 
-#include "opencl_device_selection.h"
+namespace openclwrapper { struct GPUEnv; }
+struct ds_device;
 
 ds_device const & getDeviceSelection(OUString const & pFileName, bool bForceSelection);
 

opencl/inc/opencl_device_selection.h

@@ -17,9 +17,6 @@
 #include <memory>
 
 #include <float.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
 
 #include <clew/clew.h>
 #include <tools/stream.hxx>

opencl/source/opencl_device.cxx

@@ -7,17 +7,14 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-#include <math.h>
 #include <float.h>
 #include <iostream>
-#include <sstream>
 #include <memory>
 #include <vector>
 #include <algorithm>
 
 #include <comphelper/random.hxx>
 #include <opencl/openclconfig.hxx>
-#include <opencl/openclwrapper.hxx>
 #include <opencl/platforminfo.hxx>
 #include <sal/log.hxx>
 #include <rtl/math.hxx>
@@ -26,6 +23,7 @@
 #include <opencl/OpenCLZone.hxx>
 
 #include <opencl_device.hxx>
+#include <opencl_device_selection.h>
 
 #define INPUTSIZE  15360
 #define OUTPUTSIZE 15360

opencl/source/openclwrapper.cxx

@@ -10,6 +10,7 @@
 #include <config_folders.h>
 
 #include <opencl_device.hxx>
+#include <opencl_device_selection.h>
 
 #include <opencl/openclconfig.hxx>
 #include <opencl/openclwrapper.hxx>
@@ -24,13 +25,8 @@
 #include <opencl/OpenCLZone.hxx>
 
 #include <memory>
-#include <unicode/regex.h>
 
-#include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
-
-#include <cmath>
 
 #include <officecfg/Office/Common.hxx>