Removed feature test macro definitions from source files

window.c

@@ -16,9 +16,6 @@
  * along with sxiv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#define _POSIX_C_SOURCE 200112L
-#define _WINDOW_CONFIG
-
 #include <stdlib.h>
 #include <string.h>
 #include <locale.h>
@@ -28,9 +25,11 @@
 #include "options.h"
 #include "util.h"
 #include "window.h"
-#include "config.h"
 #include "icon/data.h"
 
+#define _WINDOW_CONFIG
+#include "config.h"
+
 enum {
 	H_TEXT_PAD = 5,
 	V_TEXT_PAD = 1