debuggerd: remove useless timeout from wait_for_signal.

The watchdog already handles things for us, so the timeout logic in
wait_for_signal is pointless.

Change-Id: Id81ad5f294068216b73e04c4e2ceca072ae1bbc0
diff --git a/debuggerd/utility.h b/debuggerd/utility.h
index cd01188..d820f0f 100644
--- a/debuggerd/utility.h
+++ b/debuggerd/utility.h
@@ -77,7 +77,7 @@
 void _LOG(log_t* log, logtype ltype, const char *fmt, ...)
         __attribute__ ((format(printf, 3, 4)));
 
-int wait_for_signal(pid_t tid, int* total_sleep_time_usec);
+int wait_for_signal(pid_t tid);
 
 void dump_memory(log_t* log, Backtrace* backtrace, uintptr_t addr, const char* fmt, ...);