Revert "Throw a \RuntimeException whenever a curl request fails (sendgrid#90)"

This reverts commit 74f74c3.

Author: colinodell

lib/Client.php

@@ -415,10 +415,6 @@ private function parseResponse($channel, $content)
         $headerSize = curl_getinfo($channel, CURLINFO_HEADER_SIZE);
         $statusCode = curl_getinfo($channel, CURLINFO_HTTP_CODE);
 
-        if ($statusCode === 0) {
-            throw new \RuntimeException(curl_error($channel));
-        }
-
         $responseBody = substr($content, $headerSize);
 
         $responseHeaders = substr($content, 0, $headerSize);
@@ -457,8 +453,6 @@ private function retryRequest(array $responseHeaders, $method, $url, $body, $hea
      * @param bool   $retryOnLimit should retry if rate limit is reach?
      *
      * @return Response object
-     *
-     * @throws \RuntimeException
      */
     public function makeRequest($method, $url, $body = null, $headers = null, $retryOnLimit = false)
     {
@@ -487,8 +481,6 @@ public function makeRequest($method, $url, $body = null, $headers = null, $retry
      * @param array $requests
      *
      * @return Response[]
-     *
-     * @throws \RuntimeException
      */
     public function makeAllRequests(array $requests = [])
     {

test/unit/ClientTest.php

@@ -195,16 +195,6 @@ public function testCreateCurlOptionsWithBodyAndHeaders()
         ], $result);
     }
 
-    /**
-     * @expectedException \RuntimeException
-     * @expectedExceptionMessageRegExp /SSL certificate problem/i
-     */
-    public function testMakeRequestWithUntrustedRootCert()
-    {
-        $client = new Client('https://untrusted-root.badssl.com/');
-        $client->makeRequest('GET', 'https://untrusted-root.badssl.com/');
-    }
-
     /**
      * @param object $obj
      * @param string $name