Revert "adding 3d sprites"

This reverts commit 8c84c08f7e.

src/drawables/teapot.rs

@@ -1,57 +0,0 @@
-use crate::canvas::canvas_frame::Drawable;
-use crate::util::vertex::{VertexTypes, ColorVertex3D};
-
-///
-#[derive(Debug, Clone)]
-pub struct Teapot {
-
-    pub verts: VertexTypes,
-
-    position: (f32, f32),
-    size: (f32, f32),
-}
-
-/// Container class which implements drawable.
-impl Teapot {
-
-    ///
-    pub fn new(position: (f32, f32),
-               size: (f32, f32),
-               depth: u32) -> Teapot {
-
-        let normalized_depth = (depth as f32 / 255.0);
-
-        let verts = vec![
-            ColorVertex3D{
-                v_position: [position.0, position.1, normalized_depth],                   // top left
-                color: [0.0, 1.0, 1.0, 0.5] },
-            ColorVertex3D{
-                v_position: [position.0, position.1 + size.1, normalized_depth],          // bottom left
-                color: [1.0, 1.0, 1.0, 1.0] },
-            ColorVertex3D{
-                v_position: [position.0 + size.0, position.1 + size.1, normalized_depth], // bottom right
-                color: [1.0, 1.0, 1.0, 1.0] },
-            ColorVertex3D{
-                v_position: [position.0, position.1, normalized_depth],                   // top left
-                color: [1.0, 1.0, 1.0, 1.0] },
-            ColorVertex3D{
-                v_position: [position.0 + size.0, position.1 + size.1, normalized_depth], // bottom right
-                color: [1.0, 1.0, 1.0, 1.0] },
-            ColorVertex3D{
-                v_position: [position.0 + size.0, position.1, normalized_depth],          // top right
-                color: [1.0, 1.0, 1.0, 1.0] },
-        ];
-
-        Teapot {
-            verts: VertexTypes::ColorType(verts),
-            position: position,
-            size: size,
-        }
-    }
-}
-impl Drawable for Teapot {
-    fn get(&self) -> VertexTypes {
-        self.verts.clone()
-    }
-
-}