There is no sigreturn syscall, only rt_sigreturn.
This function is unused.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/nios2/signal.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/linux-user/nios2/signal.c b/linux-user/nios2/signal.c
index 517cd39270..133bc05673 100644
--- a/linux-user/nios2/signal.c
+++ b/linux-user/nios2/signal.c
@@ -185,13 +185,6 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
     unlock_user_struct(frame, frame_addr, 1);
 }
 
-long do_sigreturn(CPUNios2State *env)
-{
-    trace_user_do_sigreturn(env, 0);
-    qemu_log_mask(LOG_UNIMP, "do_sigreturn: not implemented\n");
-    return -TARGET_ENOSYS;
-}
-
 long do_rt_sigreturn(CPUNios2State *env)
 {
     /* Verify, can we follow the stack back */
-- 
2.34.1