chore(i18n): Remove "Defaulting to english" console warning

[ryan953]

This happens on every pageload, regardless of what locale is chosen. The page does render/rerender in other languages according to what the user has selected, so this isnt doing anything useful

Test Plan:

1. Go to https://sentry.io/settings/account/details/ and change your language settings.
   • Mine started in English, I switched to German
2. Do a full pageload (we don't async load language files if that preference changes)
3. Notice that the warning is in the console
4. Notice that the page is rendering with the chosen language

Now in step 4 the warning is gone!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #104933      +/-   ##
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- Coverage   80.52%    80.41%   -0.12%     
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  Files        9398      9393       -5     
  Lines      405708    403384    -2324     
  Branches    25923     25923              
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- Hits       326710    324382    -2328     
- Misses      78558     78562       +4     
  Partials      440       440