Merge #10524: [tests] Remove printf(...)
Summary:
0abc588 [tests] Remove printf(...) (practicalswift)
Tree-SHA512: a56fa1edce050f5a44a53842223fc99e4e8ade413047e04f2064faeb5c4a418864a94471853d5c26a20608d1dcc18b9226d7fe15172f79a66cc5cf6e1443f7e9
Backport of Core PR10524
https://github.com/bitcoin/bitcoin/pull/10524
Test Plan:
make check
Reviewers: jasonbcox, deadalnix, Fabien, O1 Bitcoin ABC, #bitcoin_abc
Reviewed By: deadalnix, O1 Bitcoin ABC, #bitcoin_abc
Differential Revision: https://reviews.bitcoinabc.org/D3259