go/types,types2: remove some unused parameters and results (cleanup)
This CL is the result of pulling the thread of some unused parameter
diagnostics reported by gopls: remove some variables holding partial
type argument expression information that are no longer needed.
Change-Id: Idfc1d0271252ce9bc5b75feb86e30dd2f6dd550b
Reviewed-on: https://go-review.googlesource.com/c/go/+/650775
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Findley <rfindley@google.com>