runtime: eliminate unused _GCstw phase

Change-Id: Ie94cd17e1975fdaaa418fa6a7b2d3b164fedc135
Reviewed-on: https://go-review.googlesource.com/16057
Reviewed-by: Rick Hudson <rlh@golang.org>

diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go
index 2dc1bcae60a14a16b604c60f72872839f4717e8e..aa7714591de729fc5467e117fb6cea9cff4a36b2 100644 (file)
--- a/src/runtime/mgc.go
+++ b/src/runtime/mgc.go
@@ -236,7 +236,6 @@ var gcBlackenPromptly bool
 
 const (
        _GCoff             = iota // GC not running; sweeping in background, write barrier disabled
-       _GCstw                    // unused state
        _GCscan                   // GC collecting roots into workbufs, write barrier ENABLED
        _GCmark                   // GC marking from workbufs, write barrier ENABLED
        _GCmarktermination        // GC mark termination: allocate black, P's help GC, write barrier ENABLED