tracehook_signal_handler: Remove sig, info, ka and regs

These parameters are nowhere used, so we can remove them.

Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/kernel/signal.c b/kernel/signal.c
index a4077e9..c4d4766 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2379,7 +2379,7 @@
 	if (!(ka->sa.sa_flags & SA_NODEFER))
 		sigaddset(&blocked, sig);
 	set_current_blocked(&blocked);
-	tracehook_signal_handler(sig, info, ka, regs, stepping);
+	tracehook_signal_handler(stepping);
 }
 
 void signal_setup_done(int failed, struct ksignal *ksig, int stepping)