internal/lsp/cmd: remove unused isRace global variable in cmd

Change-Id: I9a71df9012fe7477b9e28b8665806d2ecc18f659
Reviewed-on: https://go-review.googlesource.com/c/tools/+/188359
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>

internal/lsp/cmd/cmd_race_test.go

@@ -1,11 +0,0 @@
-// Copyright 2019 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build race
-
-package cmd_test
-
-func init() {
-	isRace = true
-}

internal/lsp/cmd/cmd_test.go

@@ -19,8 +19,6 @@ import (
 	"golang.org/x/tools/internal/lsp/tests"
 )
 
-var isRace = false
-
 type runner struct {
 	exporter packagestest.Exporter
 	data     *tests.Data