Remove unnecessary MacOS-specific includes

c/socket.c

@@ -1,20 +1,17 @@
-#include <sys/select.h>
+#include <sys/types.h>
+
+#include <sys/select.h>
+#include <sys/time.h>
 
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
 #include <assert.h>
 #include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
 #include "dtypes.h"
 
-#if defined(MACOSX)
-#include <sys/time.h>
-#include <sys/select.h>
-#include <sys/types.h>
-#endif
-
 #include "socket.h"
 
 int mysocket(int domain, int type, int protocol)