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/system/EpollFD.cxx

@@ -27,7 +27,6 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "config.h"
 #include "EpollFD.hxx"
 #include "Error.hxx"
 

src/system/EpollFD.hxx

@@ -30,7 +30,6 @@
 #ifndef EPOLL_FD_HXX
 #define EPOLL_FD_HXX
 
-#include "check.h"
 #include "UniqueFileDescriptor.hxx"
 
 #include <assert.h>

src/system/EventFD.cxx

@@ -27,7 +27,6 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "config.h"
 #include "EventFD.hxx"
 #include "system/Error.hxx"
 #include "util/Compiler.h"

src/system/EventFD.hxx

@@ -30,7 +30,6 @@
 #ifndef EVENT_FD_HXX
 #define EVENT_FD_HXX
 
-#include "check.h"
 #include "UniqueFileDescriptor.hxx"
 
 /**

src/system/EventPipe.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "EventPipe.hxx"
 #include "FileDescriptor.hxx"
 #include "system/Error.hxx"

src/system/EventPipe.hxx

@@ -20,8 +20,6 @@
 #ifndef MPD_EVENT_PIPE_HXX
 #define MPD_EVENT_PIPE_HXX
 
-#include "check.h"
-
 /**
  * A pipe that can be used to trigger an event to the read side.
  *

src/system/FatalError.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "FatalError.hxx"
 #include "util/Domain.hxx"
 #include "LogV.hxx"

src/system/FatalError.hxx

@@ -20,7 +20,6 @@
 #ifndef MPD_FATAL_ERROR_HXX
 #define MPD_FATAL_ERROR_HXX
 
-#include "check.h"
 #include "util/Compiler.h"
 
 #ifdef _WIN32

src/system/FileDescriptor.cxx

@@ -27,7 +27,6 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "config.h"
 #include "FileDescriptor.hxx"
 
 #include <assert.h>

src/system/FileDescriptor.hxx

@@ -30,7 +30,6 @@
 #ifndef FILE_DESCRIPTOR_HXX
 #define FILE_DESCRIPTOR_HXX
 
-#include "check.h"
 #include "util/Compiler.h"
 
 #include <utility>

src/system/Open.cxx

@@ -27,7 +27,6 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "config.h"
 #include "Open.hxx"
 #include "Error.hxx"
 #include "UniqueFileDescriptor.hxx"

src/system/SignalFD.cxx

@@ -27,7 +27,6 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "config.h"
 #include "SignalFD.hxx"
 #include "Error.hxx"
 

src/system/SignalFD.hxx

@@ -30,7 +30,6 @@
 #ifndef SIGNAL_FD_HXX
 #define SIGNAL_FD_HXX
 
-#include "check.h"
 #include "UniqueFileDescriptor.hxx"
 
 #include <signal.h>