musl - musl - an implementation of the standard library for Linux-based systems

diff --git a/src/internal/libc.h b/src/internal/libc.h
index 0a279184..10bd66bd 100644
--- a/src/internal/libc.h
+++ b/src/internal/libc.h

@@ -51,12 +51,6 @@ extern char *__progname, *__progname_full;

extern hidden const char __libc_version[];

-/* Designed to avoid any overhead in non-threaded processes */

-hidden void __lock(volatile int *);

-hidden void __unlock(volatile int *);

-#define LOCK(x) __lock(x)

-#define UNLOCK(x) __unlock(x)

-

hidden void __synccall(void (*)(void *), void *);

hidden int __setxid(int, int, int, int);