Move the infinite fall debug example to the 3D examples.

All our other debug examples were there.

examples2d/all_examples2.rs

@@ -14,7 +14,6 @@ mod add_remove2;
 mod collision_groups2;
 mod damping2;
 mod debug_box_ball2;
-mod debug_infinite_fall;
 mod heightfield2;
 mod joints2;
 mod platform2;
@@ -65,7 +64,6 @@ pub fn main() {
         ("Restitution", restitution2::init_world),
         ("Sensor", sensor2::init_world),
         ("(Debug) box ball", debug_box_ball2::init_world),
-        ("(Debug) infinite fall", debug_infinite_fall::init_world),
     ];
 
     // Lexicographic sort, with stress tests moved at the end of the list.

examples2d/debug_infinite_fall.rs

@@ -1,33 +0,0 @@
-use rapier2d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
-use rapier2d::geometry::{ColliderBuilder, ColliderSet};
-use rapier_testbed2d::Testbed;
-
-pub fn init_world(testbed: &mut Testbed) {
-    /*
-     * World
-     */
-    let mut bodies = RigidBodySet::new();
-    let mut colliders = ColliderSet::new();
-    let joints = JointSet::new();
-
-    let rad = 1.0;
-    // Build the dynamic box rigid body.
-    let rigid_body = RigidBodyBuilder::new_dynamic()
-        .translation(0.0, 3.0 * rad)
-        .can_sleep(false)
-        .build();
-    let handle = bodies.insert(rigid_body);
-    let collider = ColliderBuilder::ball(rad).build();
-    colliders.insert(collider, handle, &mut bodies);
-
-    /*
-     * Set up the testbed.
-     */
-    testbed.set_world(bodies, colliders, joints);
-    //    testbed.look_at(Point2::new(10.0, 10.0, 10.0), Point2::origin());
-}
-
-fn main() {
-    let testbed = Testbed::from_builders(0, vec![("Boxes", init_world)]);
-    testbed.run()
-}