[wallet] Remove CWallet::ListAccountCreditDebit() and GetAccountCreditDebit()

Summary:
Functions no longer used.

Partial backport of Core PR13825
https://github.com/bitcoin/bitcoin/pull/13825/commits/e6fcc5d39675aced61b4abc25b7d04f398e32318
https://github.com/bitcoin/bitcoin/pull/13825/commits/7a0d8f49b3e2fc8e497e9b41b251cd2c861a6640

Depends on D5316

Test Plan:

ninja check

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, jasonbcox

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, jasonbcox

Differential Revision: https://reviews.bitcoinabc.org/D5412