Remove account creation fee

https://forum.duniter.org/t/faire-le-tri-dans-la-pallet-duniter-account/11922

changed milestone to %runtime-800

created branch 187-remove-identity-creation-fee to address this issue

assigned to @c-geek

mentioned in merge request !238 (merged)

mentioned in issue #188 (closed)

mentioned in commit 5a8ad94e

mentioned in commit 3d6daf36

mentioned in commit f45ce043

changed title from Remove identity creation fee to Remove account creation fee

mentioned in commit f1c54dc7

closed with merge request !238 (merged)