Remove some old kernel header cruft not needed with uapi.
Change-Id: If543b056ae40f0eb660be4a0629ad22f4c4cb92f
diff --git a/libc/include/signal.h b/libc/include/signal.h
index e326ddb..0159bf2 100644
--- a/libc/include/signal.h
+++ b/libc/include/signal.h
@@ -44,9 +44,7 @@
#else
/* For 32-bit, we're stuck with the definitions we already shipped,
* even though they contain a sigset_t that's too small. */
-# define __ARCH_SI_UID_T __kernel_uid32_t /* TODO: 64-bit: remove this when we've switch 32-bit to uapi too. */
# include <linux/signal.h>
-# undef __ARCH_SI_UID_T
#endif
__BEGIN_DECLS
