chore: remove whonix-specific updates-proxy filter from non-whonix templates

[3nprob]

The tinyproxy updates-blacklist is only required for Whonix, therefore proposing that it be removed from non-whonix installations.

Related

• https://github.com/qubesos/qubes-issues/issues/1482
• #564

Blocked by:

• [ ] https://github.com/Whonix/qubes-whonix/pull/3

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.10%. Comparing base (13295f7) to head (11f2bbd).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #565   +/-   ##
=======================================
  Coverage   71.10%   71.10%           
=======================================
  Files           3        3           
  Lines         481      481           
=======================================
  Hits          342      342           
  Misses        139      139           

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