fadffae17f Revert "Make qt wallet test compatible with qt4" (MarcoFalke)
Pull request description:
This removes the file added in #10098
Tree-SHA512: 4aa887ec02aec943f3d74f469c935acf57e43ddbea6f979bb37d3a14670571fa2276cf578e8978de92b5854d8b462f24e5e0addfb27b92fbedf90726eb5d985e
macOS Qt minimal platform is frequently broken, and these are currently failing
with Qt 5.11.1.
The tests do pass when run on the full cocoa platform
(with `test_bitcoin-qt -platform cocoa`).