Replace custom private IP range check with built-in net.IP.IsPrivate

[kumapower17]

Replace isPrivateIPRange with built-in method net.IP.IsPrivate

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.38%. Comparing base (f24aaff) to head (79107e7).
⚠️ Report is 18 commits behind head on master.

Additional details and impacted files

@@ Coverage Diff @@ ## master #2835 +/- ## ========================================== + Coverage 93.25% 93.38% +0.13%  ========================================== Files 39 39 Lines 4652 4659 +7 ========================================== + Hits 4338 4351 +13  + Misses 218 214 -4  + Partials 96 94 -2 

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[aldas]

LGTM

[aldas]

Thanks