fix: removed account level preferences in teak

[eemaanamir]

Removed account-level notification preferences in Teak.

The backend in release/teak does not support account-level preferences, so they are no longer rendered in the frontend.

Before

After

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 59.01%. Comparing base (0e1574d) to head (8c6d872).

Files with missing lines	Patch %	Lines
...cation-preferences/NotificationCoursesDropdown.jsx	50.00%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release/teak    #1376      +/-   ##
================================================
+ Coverage         58.64%   59.01%   +0.37%     
================================================
  Files               119      118       -1     
  Lines              2413     2401      -12     
  Branches            663      663              
================================================
+ Hits               1415     1417       +2     
+ Misses              932      919      -13     
+ Partials             66       65       -1     

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