VPN wave VI expansion post-launch cleanup (Fixes #13552)

[alexgibson]

One-line summary

Removed switches and conditionals for the now launched VPN expansion work

Significant changes and points to review

Did I miss anything?

Issue / Bugzilla link

#13552

Testing

Wave VI countries should still see VPN pricing e.g.

• http://localhost:8000/en-US/products/vpn/?geo=bg

Wave VI countries should still see the 115 WNP e.g.

• http://localhost:8000/en-US/firefox/115.0/whatsnew/?geo=bg

Full list of supported countries should be visible:

• http://localhost:8000/en-US/products/vpn/?geo=cn

Supported countries should say 33:

• http://localhost:8000/en-GB/products/vpn/pricing/?geo=cn

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (b206798) 76.62% compared to head (d54c47a) 76.63%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13580   +/-   ##
=======================================
  Coverage   76.62%   76.63%           
=======================================
  Files         147      147           
  Lines        7856     7849    -7     
=======================================
- Hits         6020     6015    -5     
+ Misses       1836     1834    -2     

Files Changed	Coverage Δ
bedrock/products/views.py	67.91% <ø> (+0.43%)	⬆️
bedrock/firefox/views.py	90.21% <100.00%> (-0.22%)	⬇️
bedrock/settings/base.py	94.29% <100.00%> (-0.04%)	⬇️

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[craigcook]

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