project.config: remove legacy trybot labels and submit requirement

Legacy trybots and slowbots are no more. Clean up the unneeded labels
and the obsolete submit requirement.

For golang/go#67761.

Change-Id: I7a3851860cb29453a13496ad186ae8075b690d10
Reviewed-on: https://go-review.googlesource.com/c/All-Projects/+/792660
Reviewed-by: Cherry Mui <cherryyz@google.com>

project.config

diff --git a/project.config b/project.config
index 01a3a14..16722c7 100644
--- a/project.config
+++ b/project.config
@@ -47,11 +47,6 @@
 	removeLabel-Code-Review = +0..+2 group cria/project-golang-approvers
 	label-Hold = +0..+1 group cria/project-golang-approvers
 	removeLabel-Hold = +0..+1 group cria/project-golang-approvers
-	label-Run-TryBot = +0..+1 group cria/project-golang-may-start-trybots
-	label-Run-TryBot = +0..+1 group gobot
-	removeLabel-Run-TryBot = +0..+1 group cria/project-golang-may-start-trybots
-	label-TryBot-Result = -1..+1 group gobot
-	removeLabel-TryBot-Result = -1..+1 group cria/project-golang-may-start-trybots
 	label-TryBot-Bypass = +0..+1 group cria/project-golang-approvers
 	label-TryBot-Bypass = +0..+1 group gobot
 	label-LUCI-TryBot-Result = -1..+1 group luci_scoped_account
@@ -106,21 +101,6 @@
 	copyCondition = is:ANY
 	value = 0 This change can be submitted.
 	value = +1 Hold this change: don't submit it yet.
-[label "Run-TryBot"]
-	description = Used to start legacy TryBots.
-	function = NoBlock
-	defaultValue = 0
-	value = 0 Don't run legacy TryBots
-	value = +1 Run legacy TryBots
-	copyCondition = changekind:NO_CODE_CHANGE
-[label "TryBot-Result"]
-	description = Label for reporting legacy TryBot results.
-	function = NoBlock
-	defaultValue = 0
-	value = -1 TryBots failed
-	value = 0 No results
-	value = +1 TryBots succeeded
-	copyCondition = changekind:NO_CODE_CHANGE
 [label "LUCI-TryBot-Result"]
 	description = Label for reporting LUCI TryBot results.
 	function = NoBlock
@@ -214,12 +194,6 @@
 	submittableIf = label:LUCI-TryBot-Result=MAX
 	overrideIf = label:TryBot-Bypass=MAX
 	canOverrideInChildProjects = true
-[submit-requirement "Legacy-TryBots-Pass"]
-	description = Legacy TryBots must pass if requested, unless TryBot-Bypass+1 is set.
-	applicableIf = label:Run-TryBot=MAX
-	submittableIf = label:TryBot-Result=MAX
-	overrideIf = label:TryBot-Bypass=MAX
-	canOverrideInChildProjects = true
 [submit-requirement "No-Unresolved-Comments"]
 	description = Changes that have unresolved comments are not submittable, unless overriden by adding the hashtag allow-unresolved-comments.
 	submittableIf = -has:unresolved