diff --git a/src/wp-includes/cache.php b/src/wp-includes/cache.php
index 81a64c0aeb..67274ec358 100644
--- a/src/wp-includes/cache.php
+++ b/src/wp-includes/cache.php
@@ -388,26 +388,25 @@ class WP_Object_Cache {
 	/**
 	 * Remove the contents of the cache key in the group
 	 *
-	 * If the cache key does not exist in the group and $force parameter is set
-	 * to false, then nothing will happen. The $force parameter is set to false
-	 * by default.
+	 * If the cache key does not exist in the group, then nothing will happen.
+	 * There used to be a 3rd param (bool $force Optional. Whether to
+	 * force the unsetting of the cache key in the group).
 	 *
 	 * @since 2.0.0
 	 *
 	 * @param int|string $key What the contents in the cache are called
 	 * @param string $group Where the cache contents are grouped
-	 * @param bool $force Optional. Whether to force the unsetting of the cache
-	 *		key in the group
+	 *
 	 * @return bool False if the contents weren't deleted and true on success
 	 */
-	function delete($key, $group = 'default', $force = false) {
+	function delete( $key, $group = 'default' ) {
 		if ( empty( $group ) )
 			$group = 'default';
 
 		if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) )
 			$key = $this->blog_prefix . $key;
 
-		if ( ! $force && ! $this->_exists( $key, $group ) )
+		if ( ! $this->_exists( $key, $group ) )
 			return false;
 
 		unset( $this->cache[$group][$key] );