internal/sync: use normal comparison for keys in HashTrieMap
There's are unnecessary calls to the key's equal function -- we can just
leverage the language here. Leave the values alone for now, we want to
relax that constraint.
Change-Id: Iccfaef030a2a29b6a24a7da41e5e816b70091c7c
Reviewed-on: https://go-review.googlesource.com/c/go/+/594060
Auto-Submit: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: David Chase <drchase@google.com>