Coding standard fixes

Currently this wonderful module has 13 Coding Standard Issues: (See https://www.drupal.org/pift-ci-job/2119784)

src/ContentModerationNotificationsAccessController.php
line 24	Possible useless method overriding detected
src/Form/ContentModerationNotificationsFormBase.php
6	Unused use statement
7	Unused use statement
10	Unused use statement
209	Expected 1 space after "="; 2 found
212	A comma should follow the last multiline array item. Found: 10
293	The array declaration extends to column 237 (the limit is 80). The array content should be split up over multiple lines
298	The array declaration extends to column 235 (the limit is 80). The array content should be split up over multiple lines
tests/modules/content_moderation_notifications_test/content_moderation_notifications_test.module
16	The array declaration extends to column 81 (the limit is 80). The array content should be split up over multiple lines
tests/src/Functional/Form/CrudFormTest.php
91	The array declaration extends to column 170 (the limit is 80). The array content should be split up over multiple lines
96	The array declaration extends to column 112 (the limit is 80). The array content should be split up over multiple lines
111	Expected 1 space after "=>"; 2 found
116	The array declaration extends to column 180 (the limit is 80). The array content should be split up over multiple lines

Let's see if we can fix them here.

Original IS:

When run the code against phps, I get few warnings. The attached patch will fix this issue:

FILE: /var/www/drupalvm/docroot/checking/content_moderation_notifications/src/Form/ContentModerationNotificationsFormBase.php
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FOUND 0 ERRORS AND 3 WARNINGS AFFECTING 3 LINES
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6 | WARNING | [x] Unused use statement
7 | WARNING | [x] Unused use statement
10 | WARNING | [x] Unused use statement
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