Remove comments for commented out features

[larkox]

Summary

Remove comments about the commented out features:

• Landing page after connect to select primary platform
• User setting to select primary platform

Ticket Link

Fix: https://mattermost.atlassian.net/browse/MM-56856

[larkox]

@hmhealey If you prefer me to base this on your PR, let me know, but I thought it was ok to just send it to master.

[codecov-commenter]

Codecov Report

Attention: 28 lines in your changes are missing coverage. Please review.

Comparison is base (a844340) 41.50% compared to head (e48f990) 41.34%.

Files	Patch %	Lines
server/api.go	0.00%	28 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #499      +/-   ##
==========================================
- Coverage   41.50%   41.34%   -0.16%     
==========================================
  Files          22       22              
  Lines        6113     6136      +23     
==========================================
  Hits         2537     2537              
- Misses       3362     3385      +23     
  Partials      214      214              

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[lieut-data]

Let's QA this as part of the whole release.