docs: remove incorrect Project Files

app/Config/Email.php is not changed. The master branch in my repos was not updated.

Author: kenjis

user_guide_src/source/installation/upgrade_432.rst

@@ -64,7 +64,6 @@ Content Changes
 The following files received significant changes (including deprecations or visual adjustments)
 and it is recommended that you merge the updated versions with your application:
 
-- app/Config/Email.php
 - app/Config/Mimes.php
 - app/Views/errors/html/error_exception.php
 - composer.json
@@ -77,7 +76,6 @@ This is a list of all files in the **project space** that received changes;
 many will be simple comments or formatting that have no effect on the runtime:
 
 - app/Config/App.php
-- app/Config/Email.php
 - app/Config/Mimes.php
 - app/Views/errors/html/error_exception.php
 - composer.json