[autotest] stop requiring betty-arcnext-pre-cq

The autotest changes is blocked by this pre-cq.
If it ever gets fixed up properly, we can revert this CL.

BUG=chromium:949603
TEST=none

Change-Id: Iea13df06548c84d7658d87ab638c32f11f40e5f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1557664
Reviewed-by: Chih-Yang Hsia <paulhsia@chromium.org>
Commit-Queue: Chih-Yang Hsia <paulhsia@chromium.org>
Tested-by: Chih-Yang Hsia <paulhsia@chromium.org>
diff --git a/COMMIT-QUEUE.ini b/COMMIT-QUEUE.ini
index 7f05003..d915ad8 100644
--- a/COMMIT-QUEUE.ini
+++ b/COMMIT-QUEUE.ini
@@ -8,7 +8,7 @@
 [GENERAL]
 
 # Change the default set of PreCQ builders.
-pre-cq-configs: betty-arcnext-pre-cq betty-pre-cq moblab-generic-vm-pre-cq
+pre-cq-configs: betty-pre-cq moblab-generic-vm-pre-cq
 
 # Allow union of pre-cq configs from subdirectory
 union-pre-cq-sub-configs: yes