tpl: Fix the remaining template funcs namespace issues

See #3042

tpl/images/images.go

@@ -43,9 +43,6 @@ type Namespace struct {
 	deps *deps.Deps
 }
 
-// Namespace returns a pointer to the current namespace instance.
-func (ns *Namespace) Namespace() *Namespace { return ns }
-
 // Config returns the image.Config for the specified path relative to the
 // working directory.
 func (ns *Namespace) Config(path interface{}) (image.Config, error) {

tpl/images/images_test.go

@@ -80,17 +80,6 @@ var configTests = []struct {
 	{path: "", expect: false},
 }
 
-func TestNamespace(t *testing.T) {
-	t.Parallel()
-
-	v := viper.New()
-	v.Set("workingDir", "/a/b")
-
-	ns := New(&deps.Deps{Fs: hugofs.NewMem(v)})
-
-	assert.Equal(t, ns, ns.Namespace(), "object pointers should match")
-}
-
 func TestNSConfig(t *testing.T) {
 	t.Parallel()