dashboard: remove openbsd-{386,amd64}-62 builders

This change removes the openbsd-{386,amd64}-62 builders and associated
hosts. They were only being used for Go 1.15 development, which has
now now concluded.

For golang/go#42426

Change-Id: I6398bf2cac7cdaa17537e3e04ead0b934bbe4220
Reviewed-on: https://go-review.googlesource.com/c/build/+/342896
Trust: Carlos Amedee <carlos@golang.org>
Run-TryBot: Carlos Amedee <carlos@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alexander Rakoczy <alex@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/dashboard/builders.go b/dashboard/builders.go
index 00172f6..8d8d053 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -232,22 +232,6 @@
 		OwnerGithub: "bradfitz", // at home
 		env:         []string{"GOROOT_BOOTSTRAP=/usr/local/goboot"},
 	},
-	"host-openbsd-amd64-62": &HostConfig{
-		VMImage:            "openbsd-amd64-62",
-		machineType:        "n1-highcpu-4",
-		buildletURLTmpl:    "https://storage.googleapis.com/$BUCKET/buildlet.openbsd-amd64",
-		goBootstrapURLTmpl: "https://storage.googleapis.com/$BUCKET/gobootstrap-openbsd-amd64-go1_12.tar.gz",
-		Notes:              "OpenBSD 6.2; GCE VM is built from script in build/env/openbsd-amd64",
-		SSHUsername:        "gopher",
-	},
-	"host-openbsd-386-62": &HostConfig{
-		VMImage:            "openbsd-386-62-a",
-		machineType:        "n1-highcpu-4",
-		buildletURLTmpl:    "https://storage.googleapis.com/$BUCKET/buildlet.openbsd-386",
-		goBootstrapURLTmpl: "https://storage.googleapis.com/$BUCKET/gobootstrap-openbsd-386-go1_12.tar.gz",
-		Notes:              "OpenBSD 6.2; GCE VM is built from script in build/env/openbsd-386",
-		SSHUsername:        "gopher",
-	},
 	"host-openbsd-amd64-64": &HostConfig{
 		VMImage:            "openbsd-amd64-64-190129a",
 		MinCPUPlatform:     "Intel Skylake", // for better TSC? Maybe? see Issue 29223. builds faster at least.
@@ -2048,33 +2032,6 @@
 		},
 	})
 	addBuilder(BuildConfig{
-		Name:           "openbsd-386-62",
-		HostType:       "host-openbsd-386-62",
-		distTestAdjust: noTestDirAndNoReboot,
-		buildsRepo: func(repo, branch, goBranch string) bool {
-			// This builder is unfortunately still used by Go 1.15,
-			// so keep it around a bit longer. See golang.org/issue/42426.
-			return atMostGo1(goBranch, 15) && buildRepoByDefault(repo)
-		},
-		env: []string{
-			// cmd/go takes ~192 seconds on openbsd-386
-			// now, which is over the 180 second default
-			// dist test timeout. So, bump this builder
-			// up:
-			"GO_TEST_TIMEOUT_SCALE=2",
-		},
-	})
-	addBuilder(BuildConfig{
-		Name:           "openbsd-amd64-62",
-		HostType:       "host-openbsd-amd64-62",
-		distTestAdjust: noTestDirAndNoReboot,
-		buildsRepo: func(repo, branch, goBranch string) bool {
-			// This builder is unfortunately still used by Go 1.15,
-			// so keep it around a bit longer. See golang.org/issue/42426.
-			return atMostGo1(goBranch, 15) && buildRepoByDefault(repo)
-		},
-	})
-	addBuilder(BuildConfig{
 		Name:             "openbsd-amd64-64",
 		HostType:         "host-openbsd-amd64-64",
 		MinimumGoVersion: types.MajorMinor{1, 11},
diff --git a/dashboard/builders_test.go b/dashboard/builders_test.go
index b53f324..58aa48a 100644
--- a/dashboard/builders_test.go
+++ b/dashboard/builders_test.go
@@ -430,9 +430,6 @@
 		{b("openbsd-amd64-64@go1.16", "go"), onlyPost},
 		{b("openbsd-amd64-64@go1.15", "go"), onlyPost},
 		{b("openbsd-amd64-64@go1.14", "go"), onlyPost},
-		{b("openbsd-amd64-62@go1.16", "go"), none}, // golang.org/issue/42426.
-		{b("openbsd-amd64-62@go1.15", "go"), onlyPost},
-		{b("openbsd-amd64-62@go1.14", "go"), onlyPost},
 
 		// FreeBSD 12.2
 		{b("freebsd-amd64-12_2", "go"), both},