Revert "[autotest] restrict performance suite to run on tot"

This reverts commit 18fea1ad2b11ff7a3b5f0ce43daa5d7c2f3c425b.

Change-Id: Ieb4c00fd7e00b516cd23c685d8fa8ac13a72d1fa
Reviewed-on: https://chromium-review.googlesource.com/237290
Reviewed-by: Fang Deng <fdeng@chromium.org>
Commit-Queue: Fang Deng <fdeng@chromium.org>
Trybot-Ready: Fang Deng <fdeng@chromium.org>
Tested-by: Fang Deng <fdeng@chromium.org>
Reviewed-by: Rohit Makasana <rohitbm@chromium.org>
diff --git a/suite_scheduler.ini b/suite_scheduler.ini
index cc4ae60..e10fa74 100644
--- a/suite_scheduler.ini
+++ b/suite_scheduler.ini
@@ -751,6 +751,6 @@
 [Performance]
 run_on: nightly
 suite: performance
-branch_specs: ==tot
+branch_specs: >=tot-2
 pool: suites
 file_bugs: True