gopls/internal/test/integration/misc: reenable staticcheck test

This test reenables the staticcheck test, which now passes
with gotypesalias={,0,1}. (Staticcheck may yet need work, but
that isn't evident to our tests.)

Updates golang/go#64581

Change-Id: I1c8acca2c6b7d16e551a5c8a68be564254713d0d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/579756
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Findley <rfindley@google.com>

gopls/internal/test/integration/misc/staticcheck_test.go

@@ -15,9 +15,6 @@ import (
 func TestStaticcheckGenerics(t *testing.T) {
 	testenv.NeedsGo1Point(t, 20) // staticcheck requires go1.20+
 
-	// TODO(golang/go#65249): re-enable and fix this test with gotypesalias=1.
-	testenv.SkipMaterializedAliases(t, "staticcheck needs updates for materialized aliases")
-
 	const files = `
 -- go.mod --
 module mod.com
@@ -83,9 +80,6 @@ var FooErr error = errors.New("foo")
 func TestStaticcheckRelatedInfo(t *testing.T) {
 	testenv.NeedsGo1Point(t, 20) // staticcheck is only supported at Go 1.20+
 
-	// TODO(golang/go#65249): re-enable and fix this test with gotypesalias=1.
-	testenv.SkipMaterializedAliases(t, "staticcheck needs updates for materialized aliases")
-
 	const files = `
 -- go.mod --
 module mod.test