The commit https://gem5-review.googlesource.com/c/public/gem5/+/66231 added an API to m5 for scheduling to-tick exit events. This added the function `schedule_tick_exit`. It was later pointed out that this `schedule_tick_exit` event is redundant given the existance of `exitSimLoop`. This patch therefore removes `schedule_tick_exit` in favor of `exitSimLoop`. Change-Id: Ibecf00b98256a5da2868427d766bdc93f03c3f97 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/66511 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Maintainer: Bobby Bruce <bbruce@ucdavis.edu>