code: function(rigidBody){
          var remove=rigidBody;
          if(remove.parent!==this)return;
          remove.awake();
          var js=remove.jointLink;
          while(js!=null){
  	        var joint=js.joint;
  	        js=js.next;
  	        this.removeJoint(joint);
          }
          for(var shape=rigidBody.shapes; shape!==null; shape=shape.next){
              this.removeShape(shape);
          }
          var prev=remove.prev;
          var next=remove.next;
          if(prev!==null) prev.next=next;
          if(next!==null) next.prev=prev;
          if(this.rigidBodies==remove) this.rigidBodies=next;
          remove.prev=null;
          remove.next=null;
          remove.parent=null;
          this.numRigidBodies--;
      }
docs: I will remove the rigid body from the world.
  Rigid body that has been deleted is excluded from the calculation on a step-by-step basis.
  @param  rigidBody  Rigid body to be removed