go/ssa: remove references to GOEXPERIMENT range

Range over int is in all supported Go versions for x/tools.

Change-Id: I16d3da47121fcf34251fa5cad9561848ef699a56
Reviewed-on: https://go-review.googlesource.com/c/tools/+/616977
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Tim King <taking@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>

go/ssa/builder_test.go

@@ -1291,8 +1291,6 @@ func TestMultipleGoversions(t *testing.T) {
 // the type of each range var v (identified by print(v) calls)
 // has the expected type.
 func TestRangeOverInt(t *testing.T) {
-	testenv.NeedsGoExperiment(t, "range")
-
 	const rangeOverIntSrc = `
 		package p
 

go/ssa/interp/interp_test.go

@@ -124,6 +124,7 @@ var testdataTests = []string{
 	"methprom.go",
 	"mrvchain.go",
 	"range.go",
+	"rangeoverint.go",
 	"recover.go",
 	"reflect.go",
 	"slice2arrayptr.go",

go/ssa/interp/interp_go122_test.go → go/ssa/interp/rangefunc_test.go

@@ -16,19 +16,6 @@ import (
 	"golang.org/x/tools/internal/testenv"
 )
 
-// TestExperimentRange tests files in testdata with GOEXPERIMENT=range set.
-func TestExperimentRange(t *testing.T) {
-	testenv.NeedsGoExperiment(t, "range")
-
-	// TODO: Is cwd actually needed here?
-	goroot := makeGoroot(t)
-	cwd, err := os.Getwd()
-	if err != nil {
-		log.Fatal(err)
-	}
-	run(t, filepath.Join(cwd, "testdata", "rangeoverint.go"), goroot)
-}
-
 func TestIssue69298(t *testing.T) {
 	testenv.NeedsGo1Point(t, 23)
 

go/ssa/interp/testdata/rangeoverint.go

@@ -1,8 +1,6 @@
 package main
 
-// Range over integers.
-
-// Currently requires 1.22 and GOEXPERIMENT=range.
+// Range over integers (Go 1.22).
 
 import "fmt"