tpl: Fix the remaining template funcs namespace issues

See #3042

tpl/safe/safe.go

@@ -28,9 +28,6 @@ func New() *Namespace {
 // Namespace provides template functions for the "safe" namespace.
 type Namespace struct{}
 
-// Namespace returns a pointer to the current namespace instance.
-func (ns *Namespace) Namespace() *Namespace { return ns }
-
 // CSS returns a given string as html/template CSS content.
 func (ns *Namespace) CSS(a interface{}) (template.CSS, error) {
 	s, err := cast.ToStringE(a)

tpl/safe/safe_test.go

@@ -24,14 +24,6 @@ import (
 
 type tstNoStringer struct{}
 
-func TestNamespace(t *testing.T) {
-	t.Parallel()
-
-	ns := New()
-
-	assert.Equal(t, ns, ns.Namespace(), "object pointers should match")
-}
-
 func TestCSS(t *testing.T) {
 	t.Parallel()