MCAPI.class.php showing some error

Theme Check Plugin is throwing some errors →

WARNING: fsockopen was found in the file inc/widgets/MCAPI.class.php possible file operations.
Line 2862: $sock = fsockopen('ssl://'.$host, 443, $errno, $errstr, 30);
Line 2864: $sock = fsockopen($host, 80, $errno, $errstr, 30);

reference link → https://github.com/rainlab/mailchimp-plugin/blob/master/vendor/MCAPI.class.php

Is there a function in WordPress to replace this and make it look like WordPress and remove the error w/o making any changes in the theme or website functionality.