Remove non-functional curl service driver for now

Its requiring extensive configuration to function makes me disinclined
to revive it, though it may nevertheless happen.

lib/Conf.php

@@ -75,19 +75,13 @@ class Conf {
      * @see https://en.wikipedia.org/wiki/ISO_8601#Durations */
     public $userSessionLifetime     = "P7D";
 
-    /** @var string Feed update service driver to use, one of "serial", "subprocess", or "curl". A fully-qualified class name may also be used for custom drivers */
+    /** @var string Feed update service driver to use, one of "serial" or "subprocess". A fully-qualified class name may also be used for custom drivers */
     public $serviceDriver           = "subprocess";
     /** @var \DateInterval The interval between checks for new articles, as an ISO 8601 duration
      * @see https://en.wikipedia.org/wiki/ISO_8601#Durations */
     public $serviceFrequency        = "PT2M";
     /** @var integer Number of concurrent feed updates to perform */
     public $serviceQueueWidth       = 5;
-    /** @var string The base server address (with scheme, host, port if necessary, and terminal slash) to connect to the server when performing feed updates using cURL */
-    public $serviceCurlBase         = "http://localhost/";
-    /** @var string The user name to use when performing feed updates using cURL */
-    public $serviceCurlUser         = "";
-    /** @var string The password to use when performing feed updates using cURL */
-    public $serviceCurlPassword     = "";
 
     /** @var \DateInterval Number of seconds to wait for data when fetching feeds from foreign servers */
     public $fetchTimeout            = 10;

lib/Service/Curl/Driver.php

@@ -1,77 +0,0 @@
-<?php
-/** @license MIT
- * Copyright 2017 J. King, Dustin Wilson et al.
- * See LICENSE and AUTHORS files for details */
-
-declare(strict_types=1);
-namespace JKingWeb\Arsse\Service\Curl;
-
-use JKingWeb\Arsse\Arsse;
-
-class Driver implements \JKingWeb\Arsse\Service\Driver {
-    protected $options = [];
-    protected $queue;
-    protected $handles = [];
-
-    public static function driverName(): string {
-        return Arsse::$lang->msg("Driver.Service.Curl.Name");
-    }
-
-    public static function requirementsMet(): bool {
-        return extension_loaded("curl");
-    }
-
-    public function __construct() {
-        //default curl options for individual requests
-        $this->options = [
-            \CURLOPT_URL => Arsse::$serviceCurlBase."index.php/apps/news/api/v1-2/feeds/update",
-            \CURLOPT_CUSTOMREQUEST => "GET",
-            \CURLOPT_FAILONERROR => false,
-            \CURLOPT_FOLLOWLOCATION => false,
-            \CURLOPT_FORBID_REUSE => false,
-            \CURLOPT_CONNECTTIMEOUT => 20,
-            \CURLOPT_DNS_CACHE_TIMEOUT => 360, // FIXME: this should probably be twice the update-check interval so that the DNS cache is always in memory
-            \CURLOPT_PROTOCOLS => \CURLPROTO_HTTP | \CURLPROTO_HTTPS,
-            \CURLOPT_DEFAULT_PROTOCOL => "https",
-            \CURLOPT_USERAGENT => Arsse::$conf->fetchUserAgentString,
-            \CURLMOPT_MAX_HOST_CONNECTIONS => Arsse::$conf->serviceQueueWidth,
-            \CURLOPT_HTTPHEADER => [
-                'Accept: application/json',
-                'Content-Type: application/json',
-            ],
-            \CURLOPT_HEADER => false,
-        ];
-        // start an async session
-        $this->queue = curl_multi_init();
-        // enable pipelining
-        curl_multi_setopt($this->queue, \CURLMOPT_PIPELINING, 1);
-    }
-
-    public function queue(int ...$feeds): int {
-        foreach ($feeds as $id) {
-            $h = curl_init();
-            curl_setopt($h, \CURLOPT_POSTFIELDS, json_encode(['userId' => "", 'feedId' => $id]));
-            $this->handles[] = $h;
-            curl_multi_add_handle($this->queue, $h);
-        }
-        return sizeof($this->handles);
-    }
-
-    public function exec(): int {
-        $active = 0;
-        do {
-            curl_multi_exec($this->queue, $active);
-            curl_multi_select($this->queue);
-        } while ($active > 0);
-        return Arsse::$conf->serviceQueueWidth - $active;
-    }
-
-    public function clean(): bool {
-        foreach ($this->handles as $h) {
-            curl_multi_remove_handle($this->queue, $h);
-            curl_close($h);
-        }
-        $this->handles = [];
-        return true;
-    }
-}

locale/en.php

@@ -27,7 +27,6 @@ return [
 
     'Driver.Service.Serial.Name'                                           => 'Serialized',
     'Driver.Service.Subprocess.Name'                                       => 'Concurrent subprocess',
-    'Driver.Service.Curl.Name'                                             => 'Concurrent HTTP (curl)',
 
     'Driver.User.Internal.Name'                                            => 'Internal',