Can you fully remove Google system apps from Android including the Play Store updates?
The solution is to ‘Disable’ the apps from the Android system settings and they will no longer appear in your Play Store updates list.

E.g. for Google Currents:

Settings > Apps > All > find ‘Currents’ - tap it, select ‘Disable’.

The same applies to the all other listed apps in the question (with the exception of 'Google Play Newsstand’ which I couldn’t find in the list), and when you open the Play Store updates list anew, they will finally be gone from it as desired.