Drop modules that are not available for Python3

Author: tillea

debian/control

@@ -47,9 +47,7 @@ Section: python
 Depends: ${python3:Depends},
          ${shlibs:Depends},
          ${misc:Depends},
-         python3-concurrent.futures,
          python3-click,
-         python3-configparser,
          python3-dateutil,
          python3-packaging,
          python3-scipy,