[dev.typeparams] cmd/compile/internal/types: review of infer.go
The changes between (equivalent, and reviewed) go/types/infer.go
and infer.go can be seen by comparing patchset 1 and 2. The actual
change is just removing the "// UNREVIEWED" marker and fixing a
few comments.
Change-Id: Ieb0c07c325a2e446550f85b159f99d4dfe5f1d5a
Reviewed-on: https://go-review.googlesource.com/c/go/+/291171 Reviewed-by: Robert Findley <rfindley@google.com>
Trust: Robert Griesemer <gri@golang.org>