luci: stop blocking branch CQ on trunk tree-status.

Noticed this following a discussion about the possibility of gatekeeper
for branches.

Change-Id: I6b77691936591bd3e6ad8e9938f58e4c742df4af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2076535Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744889}

infra/config/generated/commit-queue.cfg

@@ -1203,9 +1203,6 @@ config_groups: <
       committer_list: "project-chromium-committers"
       dry_run_access_list: "project-chromium-tryjob-access"
     >
-    tree_status: <
-      url: "https://chromium-status.appspot.com/"
-    >
     tryjob: <
       builders: <
         name: "chromium/try-beta/android-binary-size"
@@ -1311,9 +1308,6 @@ config_groups: <
       committer_list: "project-chromium-committers"
       dry_run_access_list: "project-chromium-tryjob-access"
     >
-    tree_status: <
-      url: "https://chromium-status.appspot.com/"
-    >
     tryjob: <
       builders: <
         name: "chromium/try-stable/android-kitkat-arm-rel"
@@ -1368,9 +1362,6 @@ config_groups: <
       committer_list: "project-chromium-committers"
       dry_run_access_list: "project-chromium-tryjob-access"
     >
-    tree_status: <
-      url: "https://chromium-status.appspot.com/"
-    >
   >
   fallback: YES
 >

infra/config/main.star

@@ -67,7 +67,6 @@ luci.cq_group(
     # TODO(crbug/959436): enable it.
     cancel_stale_tryjobs = False,
     retry_config = cq.RETRY_ALL_FAILURES,
-    tree_status_host = 'chromium-status.appspot.com/',
     watch = cq.refset(
         repo = 'https://chromium.googlesource.com/chromium/src',
         refs = ['refs/branch-heads/.+'],

infra/config/versioned/milestones/m80/buckets/try.star

@@ -36,7 +36,6 @@ luci.cq_group(
     name = vars.cq_group.get(),
     cancel_stale_tryjobs = True,
     retry_config = cq.RETRY_ALL_FAILURES,
-    tree_status_host = 'chromium-status.appspot.com/',
     watch = cq.refset(
         repo = 'https://chromium.googlesource.com/chromium/src',
         refs = [milestone_vars.cq_ref_regexp],

infra/config/versioned/milestones/m81/buckets/try.star

@@ -36,7 +36,6 @@ luci.cq_group(
     name = vars.cq_group.get(),
     cancel_stale_tryjobs = True,
     retry_config = cq.RETRY_ALL_FAILURES,
-    tree_status_host = 'chromium-status.appspot.com/',
     watch = cq.refset(
         repo = 'https://chromium.googlesource.com/chromium/src',
         refs = [milestone_vars.cq_ref_regexp],