go.mod: update cloud.google.com/go/compute/metadata dependency

Related #615
Related googleapis/google-cloud-go#9545

Change-Id: I762dc53c61204ec5103336dab6358b9b4d1337d4
GitHub-Last-Rev: 439c393
GitHub-Pull-Request: #719
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/579495
Reviewed-by: Cody Oss <codyoss@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cody Oss <codyoss@google.com>
Reviewed-by: Jordan Liggitt <liggitt@google.com>

go.mod

@@ -3,8 +3,6 @@ module golang.org/x/oauth2
 go 1.18
 
 require (
-	cloud.google.com/go/compute/metadata v0.2.3
+	cloud.google.com/go/compute/metadata v0.3.0
 	github.com/google/go-cmp v0.5.9
 )
-
-require cloud.google.com/go/compute v1.20.1 // indirect

go.sum

@@ -1,6 +1,4 @@
-cloud.google.com/go/compute v1.20.1 h1:6aKEtlUiwEpJzM001l0yFkpXmUVXaN8W+fbkb2AZNbg=
-cloud.google.com/go/compute v1.20.1/go.mod h1:4tCnrn48xsqlwSAiLf1HXMQk8CONslYbdiEZc9FEIbM=
-cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
-cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
+cloud.google.com/go/compute/metadata v0.3.0 h1:Tz+eQXMEqDIKRsmY3cHTL6FVaynIjX2QxYC4trgAKZc=
+cloud.google.com/go/compute/metadata v0.3.0/go.mod h1:zFmK7XCadkQkj6TtorcaGlCW1hT1fIilQDwofLpJ20k=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=