m32r: struct old_sigaction is never used

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/m32r/include/asm/signal.h b/arch/m32r/include/asm/signal.h
index b2eeb0d..ea5f95e 100644
--- a/arch/m32r/include/asm/signal.h
+++ b/arch/m32r/include/asm/signal.h
@@ -110,13 +110,6 @@
 #include <asm-generic/signal-defs.h>
 
 #ifdef __KERNEL__
-struct old_sigaction {
-	__sighandler_t sa_handler;
-	old_sigset_t sa_mask;
-	unsigned long sa_flags;
-	__sigrestore_t sa_restorer;
-};
-
 struct sigaction {
 	__sighandler_t sa_handler;
 	unsigned long sa_flags;