cPanel has removed PHP version 5.4 and 5.5 from all standard EasyApache 4 profiles that ship with the product.
PHP 5.4 and 5.5 both reached End of Life more than a year ago; End of Life means a product is no longer supported.
If you made a custom EasyApache 4 profile, you will not be affected by this release.
If you still require PHP 5.4 or 5.5., we suggest you use CloudLinux. CloudLinux provides updated versions of End of Life PHP. HostDime offers a CloudLinux license for $12 a month.