net/http: remove outdated comment about a support of CONNECT method
The net/http.Transport already supports CONNECT after
https://go-review.googlesource.com/c/go/+/123156 was merged, which
deleted comments in transport.go.
Change-Id: I784fdb9b044bc8a4a29bf252328c80a11aaf6901
Reviewed-on: https://go-review.googlesource.com/c/go/+/536057
Auto-Submit: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Damien Neil <dneil@google.com>