Remove deprecated curl_close() for PHP 8.5 compatibility

curl_close() has been a no-op since PHP 8.0 and is deprecated
since PHP 8.5. CurlHandle objects are freed automatically when
they fall out of scope.

Fixes #1177

Author: mably

src/Core/Client/Adapter/Curl.php

@@ -56,16 +56,13 @@ public function getResponse(\CurlHandle $handle, $httpResponse): Response
         if (CURLE_OK !== curl_errno($handle)) {
             $errno = curl_errno($handle);
             $error = curl_error($handle);
-            curl_close($handle);
             throw new HttpException(sprintf('HTTP request failed, %s', $error), $errno);
         }
 
         $httpCode = curl_getinfo($handle, CURLINFO_RESPONSE_CODE);
         $headers = [];
         $headers[] = 'HTTP/1.1 '.$httpCode.' OK';
 
-        curl_close($handle);
-
         return new Response($httpResponse, $headers);
     }