Removing apparently redundant requirement for mcrypt.

Dockerfile

@@ -7,7 +7,7 @@ RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys C300EE8C E5267A6C 0
 RUN apt-get update
 
 # Install PHP:
-RUN apt-get install -qy git-core php5-common php5-cli php5-curl php5-imap php5-mcrypt php5-mysqlnd
+RUN apt-get install -qy git-core php5-common php5-cli php5-curl php5-imap php5-mysqlnd
 
 # Give Git some fake user details to prevent it asking when trying to test merges:
 RUN git config --global user.name "PHPCI"

PHPCI/Command/InstallCommand.php

@@ -118,7 +118,7 @@ class InstallCommand extends Command
         }
 
         // Check required extensions are present:
-        $requiredExtensions = array('PDO', 'pdo_mysql', 'mcrypt');
+        $requiredExtensions = array('PDO', 'pdo_mysql');
 
         foreach ($requiredExtensions as $extension) {
             if (!extension_loaded($extension)) {

PHPCI/Controller/PluginController.php

@@ -25,7 +25,6 @@ class PluginController extends \PHPCI\Controller
 {
     protected $required = array(
         'php',
-        'ext-mcrypt',
         'ext-pdo',
         'ext-pdo_mysql',
         'block8/b8framework',

composer.json

@@ -30,7 +30,6 @@
 
     "require": {
         "php": ">=5.3.8",
-        "ext-mcrypt": "*",
         "ext-pdo": "*",
         "ext-pdo_mysql": "*",
         "block8/b8framework": "~1.0",