FAB-15349 Remove json ledger

No need to continue to maintain this as it
has never been used for any production
systems.

Also removed unneeded test files from the
package as well (2 of them used a package-
copied variable which was remove with json).

FAB-15349 #done

Change-Id: Ic16f947da97532bb34d09554daf2201d1398b982
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

Author: mastersingh24