[libc] Use the compiler-provided stdbool.h
As with stddef.h, the compiler provides one that has all we need, so just use it.
Change-Id: I606632087359758c7316615c1ea9098db744de66
diff --git a/third_party/ulib/musl/include/stdbool.h b/third_party/ulib/musl/include/stdbool.h
deleted file mode 100644
index 82dce72..0000000
--- a/third_party/ulib/musl/include/stdbool.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#pragma once
-
-#ifndef __cplusplus
-
-#define true 1
-#define false 0
-#define bool _Bool
-
-#endif
-
-#define __bool_true_false_are_defined 1
