fix: removing outdated prequery optimizely code

[kiram15]

Since we have concluded the pre-query Optimizely experiment, we want to remove the outdated code.
Jira ticket

To properly test this ticket, you need to check out this branch and also kiram15/ENT-9480 from frontend-enterprise. Then, you need to make sure that repository is pulling your local version of frontend-enterprise my creating a file called module.config.js with this content:

module.exports = {
localModules: [
{
moduleName: '@edx/frontend-enterprise-catalog-search',
dir: '../frontend-enterprise/packages/catalog-search',
dist: 'src',
},
{
moduleName: '@edx/frontend-enterprise-utils',
dir: '../frontend-enterprise/packages/utils',
dist: 'src',
}
],
};

For all changes

• Ensure adequate tests are in place (or reviewed existing tests cover changes)
• Ensure English strings are marked for translation. See documentation for more details.

Only if submitting a visual change

• Ensure to attach screenshots
• Ensure to have UX team confirm screenshots

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.40%. Comparing base (bd4087e) to head (c754070).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1179      +/-   ##
==========================================
+ Coverage   88.36%   88.40%   +0.04%     
==========================================
  Files         396      396              
  Lines        8404     8390      -14     
  Branches     2062     2016      -46     
==========================================
- Hits         7426     7417       -9     
+ Misses        935      931       -4     
+ Partials       43       42       -1     

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