diff --git a/src/cogpowered/FineDiff/Granularity/GranularityInterface.php b/src/cogpowered/FineDiff/Granularity/GranularityInterface.php
index 07d6b66..afd4008 100644
--- a/src/cogpowered/FineDiff/Granularity/GranularityInterface.php
+++ b/src/cogpowered/FineDiff/Granularity/GranularityInterface.php
@@ -20,11 +20,6 @@
 
 interface GranularityInterface
 {
-    public function offsetExists($offset);
-    public function offsetGet($offset);
-    public function offsetSet($offset, $value);
-    public function offsetUnset($offset);
-
     /**
      * Get the delimiters that make up the granularity.
      *