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

• tinyproxy may return empty output (instead of error page) when asked for invalid address qubes-issues#1482
• fix(network): no proxying of localhost connections by default #564

Blocked by:

• block tinyproxy requests to 127.0.0.1, 10.137.255.254 Whonix/qubes-whonix#3

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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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