Revert "internal: temporarily disable tests so we can land CL 410955"

This reverts commit 5ca4cc8b9a.

Reason for revert: appears insufficient to land CL 410955.

Change-Id: If7029c9a43568e210e89d473b738400f5155715e
Reviewed-on: https://go-review.googlesource.com/c/tools/+/410995
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>

internal/lsp/tests/tests.go

@@ -544,8 +544,6 @@ func moveFile(oldpath, newpath string) (err error) {
 }
 
 func Run(t *testing.T, tests Tests, data *Data) {
-	t.Skip() // re-enable once CL 410955 has landed
-
 	t.Helper()
 	checkData(t, data)
 

internal/typeparams/normalize_test.go

@@ -17,8 +17,6 @@ import (
 )
 
 func TestStructuralTerms(t *testing.T) {
-	t.Skip() // re-enable once CL 410955 has landed
-
 	if !Enabled {
 		t.Skip("typeparams are not enabled")
 	}