[backport#17261 12/13] Cleanup: Drop unused GUI learnRelatedScripts method
Summary:
This commit does not change behavior.
https://github.com/bitcoin/bitcoin/pull/17261/commits/3afe53c4039103670cec5f9cace897ead76e20a8
Depends on D7860
Partial backport of Core PR17261
Test Plan:
ninja all check check-functional
Reviewers: #bitcoin_abc, deadalnix
Reviewed By: #bitcoin_abc, deadalnix
Differential Revision: https://reviews.bitcoinabc.org/D7861