Fix the issues reported by PHP_CodeSniffer

Problem/Motivation

FILE: /EPT-Module/ept_carousel.module

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FOUND 1 ERROR AFFECTING 1 LINE
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3 | ERROR | Missing short description in doc comment
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Steps to reproduce

Run phpcs command to get the drupal coding standard issues.
Command : phpcs --standard=Drupal,DrupalPractice --extensions='php,module,inc,yml,install,test,profile,theme,css,info,txt,md,twig' --ignore='.features,.pages,.inc,node_modules'

Proposed resolution

Many of the issues can be fixed by running the phpcbf command. For the remaining ones, we will need to manually address and then commit these changes before pushing them.