Explore removing \Drupal::service('class_loader') call in install.inc

Problem/Motivation

\Drupal::service('class_loader')->addPsr4('Drupal\\' . $module . '\\', \Drupal::root() . "/$module_path/src");
This is only called during profile requirements check for the modules being installed. This is not called for modules or the profile itself.

Steps to reproduce

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Proposed resolution

Remove it and see what happens

Remaining tasks

User interface changes

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Introduced terminology

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API changes

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Data model changes

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Release notes snippet

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