no need to have both hook_schema() and an entity type

Problem/Motivation

RedirectsFixerLogEntity defines a base table for the redirects_fixer_log entity:

 *   base_table = "redirects_fixer_log",

but so does redirects_fixer_schema():

  $schema['redirects_fixer_log'] = [
    'description' => 'The base table for redirects_fixer_log.',

There is no need to have both.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes