tests: remove patching of private ops class

[tonyandrewmeyer]

Issue

The tests currently patch a private ops class. No compatibility guarantees are provided for private names, and this will stop working in an upcoming ops release.

Solution

Remove the patching - it's no longer required with modern versions of ops anyway. Also adjust the expected default IP (from Cloudflare's DNS server, which we shouldn't be using anyway).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.73%. Comparing base (ef14e32) to head (9668caa).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #692   +/-   ##
=======================================
  Coverage   70.73%   70.73%           
=======================================
  Files          11       11           
  Lines        2952     2952           
  Branches      514      514           
=======================================
  Hits         2088     2088           
  Misses        754      754           
  Partials      110      110           

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