Remove GitHub OTP code from RFS class

src/Composer/Util/RemoteFilesystem.php

@@ -145,42 +145,6 @@ class RemoteFilesystem
             if ($e instanceof TransportException && !empty($http_response_header[0])) {
                 $e->setHeaders($http_response_header);
             }
-
-            // 401 when authentication was supplied, handle 2FA if required.
-            if ($e instanceof TransportException && 401 === $e->getCode() && $this->io->hasAuthentication($this->originUrl)) {
-                $headerNames = array_map(function($header) {
-                    return strstr($header, ':', true);
-                }, $e->getHeaders());
-
-                if ($key = array_search('X-GitHub-OTP', $headerNames)) {
-                    $headers = $e->getHeaders();
-                    list($required, $method) = array_map('trim', explode(';', substr(strstr($headers[$key], ':'), 1)));
-
-                    if ('required' === $required) {
-                        $this->io->write('Two-factor Authentication');
-
-                        if ('app' === $method) {
-                            $this->io->write('Open the two-factor authentication app on your device to view your authentication code and verify your identity.');
-                        }
-
-                        if ('sms' === $method) {
-                            // @todo
-                        }
-
-                        $this->options['github-otp'] = trim($this->io->ask('Authentication Code: '));
-
-                        $this->retry = true;
-                    }
-                } else {
-                    try {
-                        $this->promptAuthAndRetry();
-                    } catch (TransportException $e) {
-                        if ($e instanceof TransportException && !empty($http_response_header[0])) {
-                            $e->setHeaders($http_response_header);
-                        }
-                    }
-                }
-            }
         }
         if ($errorMessage && !ini_get('allow_url_fopen')) {
             $errorMessage = 'allow_url_fopen must be enabled in php.ini ('.$errorMessage.')';
@@ -283,11 +247,6 @@ class RemoteFilesystem
                         throw new TransportException($message, 401);
                     }
 
-                    // GitHub requests bail out early to allow 2FA to be applied if requested.
-                    if ('github.com' === $this->originUrl) {
-                        throw new TransportException('The "'.$this->fileUrl.'" file could not be downloaded ('.trim($message).')', 401);
-                    }
-
                     $this->promptAuthAndRetry();
                     break;
                 }
@@ -378,13 +337,6 @@ class RemoteFilesystem
             }
         }
 
-        // Handle GitHub two factor tokens.
-        if (isset($options['github-otp'])) {
-            $headers[] = 'X-GitHub-OTP: ' . $options['github-otp'];
-
-            unset($options['github-otp']);
-        }
-
         if (isset($options['http']['header']) && !is_array($options['http']['header'])) {
             $options['http']['header'] = explode("\r\n", trim($options['http']['header'], "\r\n"));
         }