various tidy changes

Author: tyler-gilbert

src/sys/sysfs/devfs.c

@@ -3,16 +3,13 @@
 
 #include "sos/fs/sysfs.h"
 #include <errno.h>
-#include <reent.h>
-#include <stdarg.h>
 #include <sys/stat.h>
 
 #include "../scheduler/scheduler_local.h"
 #include "../unistd/unistd_fs.h"
 #include "../unistd/unistd_local.h"
 
 #include "sos/fs/devfs.h"
-#include "sos/fs/sysfs.h"
 
 #include "devfs_local.h"
 
@@ -98,6 +95,7 @@ void svcall_open_device(void *args) {
 
 int devfs_init(const void *cfg) {
   // no initialization is required
+  MCU_UNUSED_ARGUMENT(cfg);
   return 0;
 }