runtime: remove unused debug.wbshadow

The wbshadow implementation was removed a year and a half ago in
1635ab7dfe, but the GODEBUG setting remained. Remove the GODEBUG
setting since it doesn't do anything.

Change-Id: I19cde324a79472aff60acb5cc9f7d4aa86c0c0ed
Reviewed-on: https://go-review.googlesource.com/36618
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>

diff --git a/src/runtime/runtime1.go b/src/runtime/runtime1.go
index 40c0e8579cb5e3c0de6638465abae7dffaade24e..d82248084640000dd6ac61f1a43845de30b70658 100644 (file)
--- a/src/runtime/runtime1.go
+++ b/src/runtime/runtime1.go
@@ -329,7 +329,6 @@ var debug struct {
        scavenge          int32
        scheddetail       int32
        schedtrace        int32
-       wbshadow          int32
 }
 
 var dbgvars = []dbgVar{
@@ -349,7 +348,6 @@ var dbgvars = []dbgVar{
        {"scavenge", &debug.scavenge},
        {"scheddetail", &debug.scheddetail},
        {"schedtrace", &debug.schedtrace},
-       {"wbshadow", &debug.wbshadow},
 }
 
 func parsedebugvars() {