go/ast/inspector: remove obsolete unsafe import
It should have been removed when we deleted the use of linkname.
Also, add a postscript to a comment. Sadly I can't find the data.
Change-Id: I05518a770b941a4f361f6ce7b80fc1b5bc94eab9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/694056
Reviewed-by: Robert Findley <rfindley@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
diff --git a/go/ast/inspector/inspector.go b/go/ast/inspector/inspector.go
index bc44b2c..a703cdf 100644
--- a/go/ast/inspector/inspector.go
+++ b/go/ast/inspector/inspector.go
@@ -85,6 +85,7 @@
// TODO: Experiment with storing only the second word of event.node (unsafe.Pointer).
// Type can be recovered from the sole bit in typ.
+// [Tried this, wasn't faster. --adonovan]
// Preorder visits all the nodes of the files supplied to New in
// depth-first order. It calls f(n) for each node n before it visits
diff --git a/go/ast/inspector/typeof.go b/go/ast/inspector/typeof.go
index be0f990..9852331 100644
--- a/go/ast/inspector/typeof.go
+++ b/go/ast/inspector/typeof.go
@@ -12,8 +12,6 @@
import (
"go/ast"
"math"
-
- _ "unsafe"
)
const (
