[wallet] Delete unused account functions
Summary:
Deletes:
- ReadAccount
- WriteAccount
- EraseAccount
- DeleteLabel
- GetLabelDestination
Partial backport of Core PR13825
https://github.com/bitcoin/bitcoin/pull/13825/commits/f85988ca7440e9ac3b33250d03ff68befb9bb51c
https://github.com/bitcoin/bitcoin/pull/13825/commits/53038b47ec51ac455f448b2d324a2bc032c45d68
Depends on D5316
Test Plan:
ninja check test_runner.py wallet_*
Reviewers: O1 Bitcoin ABC, #bitcoin_abc, Fabien
Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, Fabien
Subscribers: Fabien
Differential Revision: https://reviews.bitcoinabc.org/D5419