tools/rtla: drop __NR_sched_getattr

It's not used since commit 084ce16 ("tools/rtla:
Remove unused sched_getattr() function").

Link: https://lore.kernel.org/c355dc9ad23470098d6a8d0f31fbd702551c9ea8.1728552769.git.jstancek@redhat.com
Signed-off-by: Jan Stancek <jstancek@redhat.com>
Reviewed-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

Author: jstancek

tools/tracing/rtla/src/utils.c

@@ -211,24 +211,20 @@ long parse_ns_duration(char *val)
 /*
  * This is a set of helper functions to use SCHED_DEADLINE.
  */
-#ifdef __x86_64__
-# define __NR_sched_setattr	314
-# define __NR_sched_getattr	315
-#elif __i386__
-# define __NR_sched_setattr	351
-# define __NR_sched_getattr	352
-#elif __arm__
-# define __NR_sched_setattr	380
-# define __NR_sched_getattr	381
-#elif __aarch64__ || __riscv
-# define __NR_sched_setattr	274
-# define __NR_sched_getattr	275
-#elif __powerpc__
-# define __NR_sched_setattr	355
-# define __NR_sched_getattr	356
-#elif __s390x__
-# define __NR_sched_setattr	345
-# define __NR_sched_getattr	346
+#ifndef __NR_sched_setattr
+# ifdef __x86_64__
+#  define __NR_sched_setattr	314
+# elif __i386__
+#  define __NR_sched_setattr	351
+# elif __arm__
+#  define __NR_sched_setattr	380
+# elif __aarch64__ || __riscv
+#  define __NR_sched_setattr	274
+# elif __powerpc__
+#  define __NR_sched_setattr	355
+# elif __s390x__
+#  define __NR_sched_setattr	345
+# endif
 #endif
 
 #define SCHED_DEADLINE		6