Kill INCLUDE_SYS_MOUNT_FOR_STATFS.

Change-Id: I692179cae9d476dd5a0b5fa92813b61934dd7c87
diff --git a/cmds/installd/installd.h b/cmds/installd/installd.h
index 36c3e8c..4d86362 100644
--- a/cmds/installd/installd.h
+++ b/cmds/installd/installd.h
@@ -40,7 +40,7 @@
 
 #include <private/android_filesystem_config.h>
 
-#if INCLUDE_SYS_MOUNT_FOR_STATFS
+#if defined(__APPLE__)
 #include <sys/mount.h>
 #else
 #include <sys/statfs.h>