go/parser: remove safePos
The logic in safePos is wrong, since (*token.File).Offset does not panic,
so this function was basically a noop (since CL 559436).
To work properly it would have to be:
return p.file.Pos(p.file.Offset(pos))
Since it effectively acts as a no-op and hasn't been noticed since,
let's go ahead and remove it.
Change-Id: I00a1bcc5af6a996c63de3f1175c15062e85cf89b
Reviewed-on: https://go-review.googlesource.com/c/go/+/692955
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Alan Donovan <adonovan@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>