Remove @param $curl from MultiCurl::initHandle() (#1155)

initHandle() takes no arguments. $curl is a local variable, pulled off
the queue inside the body, and the only call site passes nothing.

Co-authored-by: Zach Borboa <zachborboa@gmail.com>

src/Curl/MultiCurl.php

@@ -825,7 +825,6 @@ class MultiCurl extends BaseCurl
     /**
      * Init Handle
      *
-     * @param                  $curl
      * @throws \ErrorException
      */
     private function initHandle()