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/song/AndSongFilter.cxx

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

src/song/BaseSongFilter.cxx

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

src/song/DetachedSong.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "song/DetachedSong.hxx"
 #include "song/LightSong.hxx"
 #include "util/UriUtil.hxx"

src/song/DetachedSong.hxx

@@ -20,7 +20,6 @@
 #ifndef MPD_DETACHED_SONG_HXX
 #define MPD_DETACHED_SONG_HXX
 
-#include "check.h"
 #include "tag/Tag.hxx"
 #include "Chrono.hxx"
 #include "util/Compiler.h"

src/song/ModifiedSinceSongFilter.cxx

@@ -17,7 +17,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "config.h"
 #include "ModifiedSinceSongFilter.hxx"
 #include "LightSong.hxx"
 #include "util/TimeISO8601.hxx"

src/song/OptimizeFilter.cxx

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

src/song/StringFilter.cxx

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

src/song/StringFilter.hxx

@@ -22,6 +22,7 @@
 
 #include "lib/icu/Compare.hxx"
 #include "util/Compiler.h"
+#include "config.h"
 
 #ifdef HAVE_PCRE
 #include "lib/pcre/UniqueRegex.hxx"

src/song/TagSongFilter.cxx

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

src/song/UriSongFilter.cxx

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