[dev.typeparams] cmd/compile/internal/types: review of sizes.go
[dev.typeparams] cmd/compile/internal/types: review of sizes.go

The changes between (equivalent, and reviewed) go/types/sizes.go
and sizes.go can be seen by comparing patchset 1 and 2. The actual
change is just removing the "// UNREVIEWED" marker.

Change-Id: Iacdcffe56023ec53bfaaac8fb112f813a7de0a95
Reviewed-on: https://go-review.googlesource.com/c/go/+/291176
Reviewed-by: Robert Findley <9179eee875d1ee628c37fb47d7e749e855ffd21f@google.com>
Trust: Robert Griesemer <a6752097faebf1f02d80107d77a9be009089afe3@golang.org>

nawawi/go,nawawi/go,golang/go,golang/go,nawawi/go,golang/go,golang/go,cloudflare/go,golang/go,nawawi/go,nawawi/go,cloudflare/go,nawawi/go,CAFxX/go,cloudflare/go,CAFxX/go,CAFxX/go,CAFxX/go,cloudflare/go,CAFxX/go,cloudflare/go,cloudflare/go,golang/go,CAFxX/go,cloudflare/go,nawawi/go,golang/go,cloudflare/go,nawawi/go,golang/go,CAFxX/go,CAFxX/go