Remove redundant comment

Co-Authored-By: Alain Schlesser <alain.schlesser@gmail.com>

Author: nylen

src/Core_Command.php

@@ -160,7 +160,6 @@ public function download( $args, $assoc_args ) {
 		$from_url             = ! empty( $download_url );
 
 		if ( $from_url ) {
-			// URL is given
 			$version      = null;
 			$from_url     = true;
 			$download_url = $args[0];