qt, wallet: Drop unused parameter in Wallet{Frame|View}::encryptWallet
Summary:
This is a backport of core-gui#109 [2/3]
https://github.com/bitcoin-core/gui/pull/109/commits/f886a20b02094d657ddb3d792d561d50f2107f07
Test Plan: ninja all check-all
Reviewers: #bitcoin_abc, Fabien
Reviewed By: #bitcoin_abc, Fabien
Differential Revision: https://reviews.bitcoinabc.org/D10738