diff --git a/core/lib/Drupal/Component/Utility/Crypt.php b/core/lib/Drupal/Component/Utility/Crypt.php
index 9fec8b50dc483..7144e3b549909 100644
--- a/core/lib/Drupal/Component/Utility/Crypt.php
+++ b/core/lib/Drupal/Component/Utility/Crypt.php
@@ -30,12 +30,9 @@ class Crypt {
     static $random_state, $bytes;
     // Initialize on the first call. The contents of $_SERVER includes a mix of
     // user-specific and system information that varies a little with each page.
+    // Further initialize with the somewhat random PHP process ID.
     if (!isset($random_state)) {
-      $random_state = print_r($_SERVER, TRUE);
-      if (function_exists('getmypid')) {
-        // Further initialize with the somewhat random PHP process ID.
-        $random_state .= getmypid();
-      }
+      $random_state = print_r($_SERVER, TRUE) . getmypid();
       $bytes = '';
     }
     if (strlen($bytes) < $count) {
diff --git a/core/modules/color/color.module b/core/modules/color/color.module
index a903a7806f10b..e9710c283fc4b 100644
--- a/core/modules/color/color.module
+++ b/core/modules/color/color.module
@@ -295,26 +295,24 @@ function color_scheme_form_submit($form, &$form_state) {
     $palette += $info['schemes']['default']['colors'];
   }
 
-  // Make sure enough memory is available, if PHP's memory limit is compiled in.
-  if (function_exists('memory_get_usage')) {
-    // Fetch source image dimensions.
-    $source = drupal_get_path('theme', $theme) . '/' . $info['base_image'];
-    list($width, $height) = getimagesize($source);
+  // Make sure enough memory is available.
+  // Fetch source image dimensions.
+  $source = drupal_get_path('theme', $theme) . '/' . $info['base_image'];
+  list($width, $height) = getimagesize($source);
 
-    // We need at least a copy of the source and a target buffer of the same
-    // size (both at 32bpp).
-    $required = $width * $height * 8;
-    // We intend to prevent color scheme changes if there isn't enough memory
-    // available.  memory_get_usage(TRUE) returns a more accurate number than
-    // memory_get_usage(), therefore we won't inadvertently reject a color
-    // scheme change based on a faulty memory calculation.
-    $usage = memory_get_usage(TRUE);
-    $memory_limit = ini_get('memory_limit');
-    $size = parse_size($memory_limit);
-    if (!drupal_check_memory_limit($usage + $required, $memory_limit)) {
-      drupal_set_message(t('There is not enough memory available to PHP to change this theme\'s color scheme. You need at least %size more. Check the <a href="@url">PHP documentation</a> for more information.', array('%size' => format_size($usage + $required - $size), '@url' => 'http://www.php.net/manual/ini.core.php#ini.sect.resource-limits')), 'error');
-      return;
-    }
+  // We need at least a copy of the source and a target buffer of the same
+  // size (both at 32bpp).
+  $required = $width * $height * 8;
+  // We intend to prevent color scheme changes if there isn't enough memory
+  // available.  memory_get_usage(TRUE) returns a more accurate number than
+  // memory_get_usage(), therefore we won't inadvertently reject a color
+  // scheme change based on a faulty memory calculation.
+  $usage = memory_get_usage(TRUE);
+  $memory_limit = ini_get('memory_limit');
+  $size = parse_size($memory_limit);
+  if (!drupal_check_memory_limit($usage + $required, $memory_limit)) {
+    drupal_set_message(t('There is not enough memory available to PHP to change this theme\'s color scheme. You need at least %size more. Check the <a href="@url">PHP documentation</a> for more information.', array('%size' => format_size($usage + $required - $size), '@url' => 'http://www.php.net/manual/ini.core.php#ini.sect.resource-limits')), 'error');
+    return;
   }
 
   // Delete old files.
diff --git a/core/modules/simpletest/simpletest.install b/core/modules/simpletest/simpletest.install
index 020b3cdac2e0b..4b940eddbfa80 100644
--- a/core/modules/simpletest/simpletest.install
+++ b/core/modules/simpletest/simpletest.install
@@ -17,7 +17,6 @@ function simpletest_requirements($phase) {
   $requirements = array();
 
   $has_curl = function_exists('curl_init');
-  $has_hash = function_exists('hash_hmac');
   $has_domdocument = method_exists('DOMDocument', 'loadHTML');
   $open_basedir = ini_get('open_basedir');
 
@@ -29,14 +28,6 @@ function simpletest_requirements($phase) {
     $requirements['curl']['severity'] = REQUIREMENT_ERROR;
     $requirements['curl']['description'] = t('The testing framework could not be installed because the PHP <a href="@curl_url">cURL</a> library is not available.', array('@curl_url' => 'http://php.net/manual/curl.setup.php'));
   }
-  $requirements['hash'] = array(
-    'title' => t('hash'),
-    'value' => $has_hash ? t('Enabled') : t('Not found'),
-  );
-  if (!$has_hash) {
-    $requirements['hash']['severity'] = REQUIREMENT_ERROR;
-    $requirements['hash']['description'] = t('The testing framework could not be installed because the PHP <a href="@hash_url">hash</a> extension is disabled.', array('@hash_url' => 'http://php.net/manual/book.hash.php'));
-  }
 
   $requirements['php_domdocument'] = array(
     'title' => t('PHP DOMDocument class'),