allow nullptr when not care the removed array value
diff --git a/include/json/value.h b/include/json/value.h
index 8a0054c..e7a9225 100644
--- a/include/json/value.h
+++ b/include/json/value.h
@@ -562,7 +562,7 @@
   /** \brief Remove the indexed array element.
 
       O(n) expensive operations.
-      Update 'removed' if removed.
+      Update 'removed' iff removed.
       \return true if removed (no exceptions)
   */
   bool removeIndex(ArrayIndex index, Value* removed);