Bump golang.org/x/oauth2 from 0.18.0 to 0.19.0

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>

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/spf13/cobra v1.8.0
 	github.com/stretchr/testify v1.9.0
-	golang.org/x/oauth2 v0.18.0
+	golang.org/x/oauth2 v0.19.0
 )
 
 require (
@@ -23,7 +23,6 @@ require (
 	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
 	github.com/go-git/go-billy/v5 v5.5.0 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
@@ -39,8 +38,6 @@ require (
 	golang.org/x/net v0.22.0 // indirect
 	golang.org/x/sys v0.18.0 // indirect
 	golang.org/x/tools v0.13.0 // indirect
-	google.golang.org/appengine v1.6.7 // indirect
-	google.golang.org/protobuf v1.33.0 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )