Fix ascii diagram and remove unused code

lib/shape/shape.go

@@ -167,11 +167,10 @@ func NewShape(shapeType string, box *geo.Box) Shape {
 // p is the prev point (used to calculate slope)
 // s is the point on the actual shape border that'll be returned
 //
-//	p
-//	│
-//	│
-//	▼
-//
+//      p
+//      │
+//      │
+//      ▼
 // ┌────r─────────────────────────┐
 // │                              │
 // │    │                         │

lib/shape/shape_double_circle.go

@@ -1,8 +1,9 @@
 package shape
 
 import (
+	"math"
+
 	"oss.terrastruct.com/d2/lib/geo"
-	"oss.terrastruct.com/d2/lib/svg"
 )
 
 type shapeDoubleCircle struct {
@@ -18,20 +19,19 @@ func NewDoubleCircle(box *geo.Box) Shape {
 	}
 }
 
-func doubleCirclePath(box *geo.Box) *svg.SvgPathContext {
-	// halfYFactor := 43.6 / 87.3
-	pc := svg.NewSVGPathContext(box.TopLeft, box.Width, box.Height)
-	pc.StartAt(pc.Absolute(0.25, 0))
-	// pc
-	return pc
+func (s shapeDoubleCircle) AspectRatio1() bool {
+	return true
+}
+
+func (s shapeDoubleCircle) GetDimensionsToFit(width, height, padding float64) (float64, float64) {
+	radius := math.Ceil(math.Sqrt(math.Pow(width/2, 2)+math.Pow(height/2, 2))) + padding
+	return radius * 2, radius * 2
+}
+
+func (s shapeDoubleCircle) GetInsidePlacement(width, height, padding float64) geo.Point {
+	return *geo.NewPoint(s.Box.TopLeft.X+math.Ceil(s.Box.Width/2-width/2), s.Box.TopLeft.Y+math.Ceil(s.Box.Height/2-height/2))
 }
 
 func (s shapeDoubleCircle) Perimeter() []geo.Intersectable {
-	return doubleCirclePath(s.Box).Path
-}
-
-func (s shapeDoubleCircle) GetSVGPathData() []string {
-	return []string{
-		doubleCirclePath(s.Box).PathData(),
-	}
+	return []geo.Intersectable{geo.NewEllipse(s.Box.Center(), s.Box.Width/2, s.Box.Height/2)}
 }