Drupal Coding Standards Issues | phpcs

Problem/Motivation

Getting following error/warnings

FILE: /var/www/html/modules/contrib/views_contact_form/views_contact_form.module
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FOUND 1 ERROR AFFECTING 1 LINE
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1 | ERROR | [x] Missing file doc comment
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /var/www/html/modules/contrib/views_contact_form/src/Plugin/Field/FieldFormatter/ViewsContactFormEmailFormatter.php
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FOUND 0 ERRORS AND 11 WARNINGS AFFECTING 11 LINES
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45 | WARNING | Unused variable $delta.
53 | WARNING | ContactForm::load calls should be avoided in classes, use dependency injection instead
66 | WARNING | \Drupal calls should be avoided in classes, use dependency injection instead
74 | WARNING | \Drupal calls should be avoided in classes, use dependency injection instead
76 | WARNING | \Drupal calls should be avoided in classes, use dependency injection instead
85 | WARNING | ContactForm::load calls should be avoided in classes, use dependency injection instead
88 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
93 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
105 | WARNING | ContactForm::loadMultiple calls should be avoided in classes, use dependency injection instead
120 | WARNING | #description values usually have to run through t() for translation
130 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
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Time: 1.16 secs; Memory: 6MB

Steps to reproduce

Run following command

phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml modules/contrib/views_contact_form/

Proposed resolution

Above error/warnings need to be fixed