[chore]: Bump golang.org/x/oauth2 from 0.18.0 to 0.19.0 (#2816)

Bumps [golang.org/x/oauth2](https://github.com/golang/oauth2) from 0.18.0 to 0.19.0.
- [Commits](https://github.com/golang/oauth2/compare/v0.18.0...v0.19.0)

---
updated-dependencies:
- dependency-name: golang.org/x/oauth2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

1 files changed, 0 insertions, 54 deletions

diff --git a/vendor/google.golang.org/appengine/internal/identity.go b/vendor/google.golang.org/appengine/internal/identity.go
deleted file mode 100644
index 0f95aa91d..000000000
--- a/vendor/google.golang.org/appengine/internal/identity.go
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2011 Google Inc. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
-// license that can be found in the LICENSE file.
-
-package internal
-
-import (
-	"context"
-	"os"
-)
-
-var (
-	// This is set to true in identity_classic.go, which is behind the appengine build tag.
-	// The appengine build tag is set for the first generation runtimes (<= Go 1.9) but not
-	// the second generation runtimes (>= Go 1.11), so this indicates whether we're on a
-	// first-gen runtime. See IsStandard below for the second-gen check.
-	appengineStandard bool
-
-	// This is set to true in identity_flex.go, which is behind the appenginevm build tag.
-	appengineFlex bool
-)
-
-// AppID is the implementation of the wrapper function of the same name in
-// ../identity.go. See that file for commentary.
-func AppID(c context.Context) string {
-	return appID(FullyQualifiedAppID(c))
-}
-
-// IsStandard is the implementation of the wrapper function of the same name in
-// ../appengine.go. See that file for commentary.
-func IsStandard() bool {
-	// appengineStandard will be true for first-gen runtimes (<= Go 1.9) but not
-	// second-gen (>= Go 1.11).
-	return appengineStandard || IsSecondGen()
-}
-
-// IsSecondGen is the implementation of the wrapper function of the same name in
-// ../appengine.go. See that file for commentary.
-func IsSecondGen() bool {
-	// Second-gen runtimes set $GAE_ENV so we use that to check if we're on a second-gen runtime.
-	return os.Getenv("GAE_ENV") == "standard"
-}
-
-// IsFlex is the implementation of the wrapper function of the same name in
-// ../appengine.go. See that file for commentary.
-func IsFlex() bool {
-	return appengineFlex
-}
-
-// IsAppEngine is the implementation of the wrapper function of the same name in
-// ../appengine.go. See that file for commentary.
-func IsAppEngine() bool {
-	return IsStandard() || IsFlex()
-}