check.h: remove obsolete header

Since we switched from autotools to Meson in commit
94592c1406, we don't need to include
`config.h` early to properly enable large file support.  Meson passes
the required macros on the compiler command line instead of defining
them in `config.h`.

This means we can include `config.h` at any time, whenever we want to
check its macros, and there are no ordering constraints.

src/lib/upnp/ClientInit.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "ClientInit.hxx"
 #include "Init.hxx"
 #include "Callback.hxx"

src/lib/upnp/ClientInit.hxx

@@ -20,8 +20,6 @@
 #ifndef MPD_UPNP_CLIENT_INIT_HXX
 #define MPD_UPNP_CLIENT_INIT_HXX
 
-#include "check.h"
-
 #include <upnp.h>
 
 UpnpClient_Handle

src/lib/upnp/ContentDirectoryService.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "ContentDirectoryService.hxx"
 #include "UniqueIxml.hxx"
 #include "Device.hxx"

src/lib/upnp/Device.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "Device.hxx"
 #include "Util.hxx"
 #include "lib/expat/ExpatParser.hxx"

src/lib/upnp/Discovery.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "Discovery.hxx"
 #include "ContentDirectoryService.hxx"
 #include "Log.hxx"

src/lib/upnp/Init.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "Init.hxx"
 #include "thread/Mutex.hxx"
 #include "util/RuntimeError.hxx"

src/lib/upnp/Init.hxx

@@ -20,8 +20,6 @@
 #ifndef MPD_UPNP_INIT_HXX
 #define MPD_UPNP_INIT_HXX
 
-#include "check.h"
-
 void
 UpnpGlobalInit();