project.config: lock down release-branch.go1.27

Lock down the release branch to behave like the other release
branches, as per the release process. This effectively undoes
the short-term additional permission granted to all approvers
in CL 799482.

For go.dev/issue/79581.

Change-Id: Icb5ecb0de40f6ee518aef6a29c39cc5de6ecc3dc
Reviewed-on: https://go-review.googlesource.com/c/All-Projects/+/811600
Reviewed-by: Neal Patel <nealpatel@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>

project.config

diff --git a/project.config b/project.config
index 16722c7..1cadb05 100644
--- a/project.config
+++ b/project.config
@@ -162,14 +162,6 @@
 	viewAllAccounts = group luci_scoped_account
 	viewAllAccounts = group mdb/copybara-git-readers
 	viewAllAccounts = group mdb/gwsq
-[access "refs/heads/release-branch.go1.27"]
-	submit = "group autoupdate-service-accounts#ROUsccouXgvcNyywY5CbYg=="
-	submit = group autoupdate-vigil-service-accounts
-	submit = group cria/project-golang-approvers
-	submit = group gobot
-	submit = group luci_scoped_account
-	label-Auto-Submit = +0..+1 group cria/project-golang-approvers
-	label-Auto-Submit = +0..+1 group gobot
 [notify "checkins"]
 	header = to
 	email = golang-checkins@googlegroups.com