dashboard: remove fake ARM5 builders

The spacemonkey actually-ARM5 builders have been working and are better.

The arm5 builders being deleted here were Scaleway C1 servers (which
have better-than-ARM5 hardware) but running with GOARM=5-compiled
binaries. That test a bit, but not enough.

Fixes golang/go#19662
Fixes golang/go#19848 (looks like this is only missing owner annotation)

Change-Id: I1d3b21b0139d4d4ccf2c0baebd4f2f01b4024861
Reviewed-on: https://go-review.googlesource.com/41618
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/dashboard/builders.go b/dashboard/builders.go
index 301b7ed..705a2bc 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -84,6 +84,7 @@
 		ExpectNum:      3,
 		env:            []string{"GOROOT_BOOTSTRAP=/usr/local/go"},
 		ReverseAliases: []string{"linux-arm-arm5spacemonkey"},
+		OwnerGithub:    "zeebo",
 	},
 	"host-openbsd-amd64-60": &HostConfig{
 		VMImage:            "openbsd-amd64-60",
@@ -907,16 +908,6 @@
 		StopAfterMake: true,
 	})
 	addBuilder(BuildConfig{
-		Name:     "linux-arm-arm5",
-		HostType: "host-linux-arm",
-		Notes:    "GOARM=5, but running on newer-than GOARM=5 hardware",
-		FlakyNet: true,
-		env: []string{
-			"GOARM=5",
-			"GO_TEST_TIMEOUT_SCALE=5", // slow.
-		},
-	})
-	addBuilder(BuildConfig{
 		Name:     "linux-arm-arm5spacemonkey",
 		HostType: "host-linux-arm5spacemonkey",
 		env:      []string{"GOARM=5"},