Scrub uapi headers slightly harder.

There's no point having always-false tests. It just makes the headers
harder to read.

Bug: 11560081
Change-Id: I6187755e1514ca9ff5642b3c1b0489f22edddaf5
diff --git a/libc/kernel/uapi/asm-arm/asm/unistd.h b/libc/kernel/uapi/asm-arm/asm/unistd.h
index f99bfb1..4ce108c 100644
--- a/libc/kernel/uapi/asm-arm/asm/unistd.h
+++ b/libc/kernel/uapi/asm-arm/asm/unistd.h
@@ -19,12 +19,7 @@
 #ifndef _UAPI__ASM_ARM_UNISTD_H
 #define _UAPI__ASM_ARM_UNISTD_H
 #define __NR_OABI_SYSCALL_BASE 0x900000
-#if defined(__thumb__) || defined(__ARM_EABI__)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __NR_SYSCALL_BASE 0
-#else
-#define __NR_SYSCALL_BASE __NR_OABI_SYSCALL_BASE
-#endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __NR_restart_syscall (__NR_SYSCALL_BASE+ 0)
 #define __NR_exit (__NR_SYSCALL_BASE+ 1)
@@ -468,22 +463,19 @@
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __ARM_NR_usr32 (__ARM_NR_BASE+4)
 #define __ARM_NR_set_tls (__ARM_NR_BASE+5)
-#ifdef __ARM_EABI__
 #undef __NR_time
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_umount
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_stime
 #undef __NR_alarm
 #undef __NR_utime
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_getrlimit
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_select
 #undef __NR_readdir
 #undef __NR_mmap
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_socketcall
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #undef __NR_syscall
 #undef __NR_ipc
 #endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#endif