Remove unused EDP JSON validation schemes to prevent confusion

There are some JSON validation schemes that are no longer used. These
should be removed because they may mislead developers looking at the
code (what job types are supported, data source endpoints, etc)

Change-Id: Idc83f1d503aae166bf5392e4e21824fdd19f5a8d
Merge "Remove unused EDP JSON validation schemes to prevent confusion"