diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 2fce118fc3b3ee2bd87385fea9f2023863ab2809..8d0989836c503b8cbf5b22571079300ad50b424a 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -1746,30 +1746,6 @@ function _drupal_shutdown_function() {
   }
 }
 
-/**
- * Compares the memory required for an operation to the available memory.
- *
- * @param $required
- *   The memory required for the operation, expressed as a number of bytes with
- *   optional SI or IEC binary unit prefix (e.g. 2, 3K, 5MB, 10G, 6GiB, 8bytes,
- *   9mbytes).
- * @param $memory_limit
- *   (optional) The memory limit for the operation, expressed as a number of
- *   bytes with optional SI or IEC binary unit prefix (e.g. 2, 3K, 5MB, 10G,
- *   6GiB, 8bytes, 9mbytes). If no value is passed, the current PHP
- *   memory_limit will be used. Defaults to NULL.
- *
- * @return
- *   TRUE if there is sufficient memory to allow the operation, or FALSE
- *   otherwise.
- *
- * @deprecated in Drupal 8.x-dev, will be removed before Drupal 8.0.
- *   Use \Drupal\Component\Utility\Environment::checkMemoryLimit().
- */
-function drupal_check_memory_limit($required, $memory_limit = NULL) {
-  return Environment::checkMemoryLimit($required, $memory_limit);
-}
-
 /**
  * Get locking layer instance.
  *