I would like to propose removing the defunct build capabilities of JAVA, RUBY, TCL, & EXPLICIT options.
These build configurations are not supported or working for a long time. The removal of these packages allows to greatly reduces the complexity of the wrapping infrastructure and the maintenance efforts needed to keep the python wrapping healthy.
A proposal to accomplish this is located at : https://github.com/InsightSoftwareConsortium/ITK/pull/3212