Remove old and unused classes

[averbraeck]

There are many classes in OTS that need to be maintained, but are not in use anymore. Examples are a number of tactical planners (e.g., the LaneBasedGtuFollowingDirectedChangeTacticalPlanner), IdmOld, IdmPlusOld, AbstractLanebasedGtu2, etc. It is suggested to remove these classes

There are also some classes where we have do decide if we want to keep them in the current version, or remove them for now and add them back later if needed. Examples are Platoons, the Toledo classes, and several other unused (and probably unmaintained) classes.

[averbraeck]

Already removed the following classes in the branch feature-remove-old:

• AbstractLaneBasedGtu.java
• LaneBasedGtuFollowingDirectedChangeTacticalPlanner.java
• LaneBasedGtuFollowingDirectedChangeTacticalPlannerFactory.java
• AbstractGtuGeneratorOld.java
• GtuGeneratorIndividualOld.java
• Renamed AbstractLaneBasedGtu2 to AbstractLaneBasedGtu

[averbraeck]

Doubts about the following classes, since they are in use in several places:

• LaneBasedCfLcTacticalPlanner and LaneBasedCfLcTacticalPlannerFacotory: are these the 'standard' tactical planners? Or are these also outdated? They seem to be in use in several places, but they use GtuFollowingModelOld.
• Same for LaneBasedGtuFollowingTacticalPlanner and LaneBasedGtuFollowingTacticalPlannerFactory. Also in use, but using GtuFollowingModelOld.
• AbstractGtuFollowingModelMobil. Has this class been updated to the latest 'standard' for our GTUs? Strangely, the constants in this class are used elsewhere... For instance in AbstractLaneChangeModel.
• GtuFollowingModelOld is in use in all kinds of classes, including ones that probably have to stay... Often, the CarFollowingModel is cast to GtuFollowingModelOld in these classes. The 'Old' class is in wide use. In graphs, plots, DirectedFixedLaneChangeModel, AbstractDirectedLaneChangeModel, the lanechangemobil classes, and the above mentioned tactical planners.
• IdmOld and IdmPlusOld. Still in use -- we should be able to replace them by Idm and IdmPlus where they are used?
• The toledo package. Should we keep it?

In general, I am all in favor of implementing 'textbook' algorithms into OTS for teaching purposes (like instantaneous lane change). But they should be built on exactly the same perception framework as the more advanced algorithms, but just use a smaller percentage of the information that is available to make their decisions, resulting is more simplistic and less optimal driving behavior.

@WJSchakel : any ideas what to keep, what to upgrade, what to delete?

[averbraeck]

The branch feature-remove-old has been merged with the main branch. So a number of the classes 'without side-effects' have been removed.