On the PAUSE news page:

2014-03-26 The registered modules list is being retired. The module list (aka 03modlist.data) stored a curated list of modules with some metadata. It has been superseded by metadata stored in the META.json file. Module registration once provided a means to get feedback before uploading a new distribution. This advice can now be gotten at PrePAN. The module list will cease to contain any module data on or about April 1, 2014.