crypto/tls: rm marshalEncryptedClientHelloConfigList dead code
This package internal function has no call sites.
Change-Id: I262058199fd2f387ef3b5e21099421720cc5413e
Reviewed-on: https://go-review.googlesource.com/c/go/+/707815
TryBot-Bypass: Daniel McCarney <daniel@binaryparadox.net>
Auto-Submit: Roland Shoemaker <roland@golang.org>
Auto-Submit: Daniel McCarney <daniel@binaryparadox.net> Reviewed-by: Carlos Amedee <carlos@golang.org> Reviewed-by: Roland Shoemaker <roland@golang.org>