s390: remove do_signal() prototype and do_notify_resume() function

Both are no longer used since the conversion to generic
entry, therefore remove them.

Fixes: 56e62a7370 ("s390: convert to generic entry")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/kernel/entry.h

@@ -28,10 +28,8 @@ void do_non_secure_storage_access(struct pt_regs *regs);
 void do_secure_storage_violation(struct pt_regs *regs);
 void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str);
 void kernel_stack_overflow(struct pt_regs * regs);
-void do_signal(struct pt_regs *regs);
 void handle_signal32(struct ksignal *ksig, sigset_t *oldset,
 		     struct pt_regs *regs);
-void do_notify_resume(struct pt_regs *regs);
 
 void __init init_IRQ(void);
 void do_io_irq(struct pt_regs *regs);

arch/s390/kernel/signal.c

@@ -533,9 +533,3 @@ void arch_do_signal_or_restart(struct pt_regs *regs, bool has_signal)
 	 */
 	restore_saved_sigmask();
 }
-
-void do_notify_resume(struct pt_regs *regs)
-{
-	tracehook_notify_resume(regs);
-	rseq_handle_notify_resume(NULL, regs);
-}