Revert "Specify python3 version in apt install commands"

This reverts commit 1925e87ad52dcca103cd507185bf2aea48817124.

Reason for revert: gLinux is now on 3.10 and debian:testing no longer supports 3.9

Change-Id: I7ccabf16a8951b05dd98b3010d0ca068239e97e8
1 file changed