Remove unnecessary find_package(Python3 ...)

As discussed via Mattermost, that find_package call seems to be unnecessary and causes errors due to mismatched Python versions.

.vcsetup

-Subproject commit 6d6fcbd8272d8c2e9bae70afe0f3841e6f9d1c80
+Subproject commit 194577ed77af3d15f11c898f00084c4b1458cd74