Remove dataformats in development that are not needed for the unpacker.

This removes cluster 1D, 2D and Stubs experiments, corresponding to the following commits:
commit 72625f03b331778de92bcd50dfd89bcd992693db.
commit bdbaf65b5e72f6ae4e0b78f958d729d7cd23e41b.
commit 4ad99728850d750459dfd39d3960024fd080b115.