fix organization

src/visitor/Tupfile

@@ -1,3 +0,0 @@
-include_rules
-
-: main.go |> !gccgo |> ../../bin/visitor

src/visitor/main.go

@@ -1,43 +0,0 @@
-package main
-
-// Shape defines the base for shape functions
-type Shape interface {
-	Area() float64
-	Perimeter() float64
-}
-
-type Square struct {
-	Shape
-	Arm float64
-}
-
-func (s *Square) Area() float64 {
-	return s.Arm * s.Arm
-}
-
-func (s *Square) Perimeter() float64 {
-	return s.Arm * 4
-}
-
-type Triangle struct {
-	Shape
-	Base   float64
-	Height float64
-}
-
-func (t *Triangle) Area() float64 {
-	return (t.Base * t.Height) / 2
-}
-
-func (t *Triangle) Perimeter() float64 {
-	return 0.0 // I forgot how to do this from just base and height.
-}
-
-func main() {
-	t := &Triangle{
-		Base:   15,
-		Height: 30,
-	}
-
-	myT := t.(Shape)
-}