Remove curl_close() as it's useless as of 8.0, deprecated as of 8.5

src/MD_STD.php

@@ -392,7 +392,6 @@ final class MD_STD {
         // if ($err = curl_errno($curl)) echo $err;
         // if ($errmsg  = curl_error($curl)) echo $errmsg;
 
-        \curl_close($curl);
         if (\is_bool($result)) {
             return "";
         }
@@ -478,7 +477,6 @@ final class MD_STD {
         ]);
         curl_exec($ch);
         $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
-        curl_close($ch);
         if ($code !== 200) {
             return false;
         }
@@ -770,7 +768,6 @@ final class MD_STD {
 
         \curl_setopt($ch, CURLOPT_FILE, $fp);
         \curl_exec($ch);
-        \curl_close($ch);
 
         $mime_type = MD_STD::mime_content_type($tmp_file);
         self::unlink($tmp_file);