Revert "custom-qt5-libs-build-include libaccounts-glib should not install to...

Revert "custom-qt5-libs-build-include libaccounts-glib should not install to "/usr/lib/python3/dist-packages/gi/overrides/Accounts.py""

This reverts commit 68596625.

As mentioned in !198 (closed), the issue with attempted installs to the system's site-python directory was addressed upstream: That behavior is now protected behind a build-configuration option which defaults to disabled, so the workaround here is no longer necessary.