Remove some irrelevant code.

src_testbed/objects/heightfield.rs

@@ -1,6 +1,6 @@
 #[cfg(feature = "dim3")]
 use crate::objects::node::{self, GraphicsNode};
-use eagl::shape;
+use cdl::shape;
 use kiss3d::resource::Mesh;
 use kiss3d::window::Window;
 use na::{self, Point3};

src_testbed/objects/polyline.rs

@@ -1,4 +1,4 @@
-use eagl2d::shape;
+use cdl2d::shape;
 use kiss3d::window::Window;
 use na::{Isometry2, Point2, Point3};
 use nphysics2d::object::{ColliderAnchor, DefaultColliderHandle, DefaultColliderSet};