diff --git a/shard.yml b/shard.yml
index 7127bd61a4..2b8c2a5735 100644
--- a/shard.yml
+++ b/shard.yml
@@ -37,6 +37,6 @@ development_dependencies:
   ameba:
     github: crystal-ameba/ameba
 
-crystal: 1.13.2
+crystal: 1.15.0
 
 license: Apache-2.0
diff --git a/src/stdlib/iterator.cr b/src/stdlib/iterator.cr
deleted file mode 100644
index 624cd46d96..0000000000
--- a/src/stdlib/iterator.cr
+++ /dev/null
@@ -1,13 +0,0 @@
-module Iterator(T)
-  def self.empty
-    EmptyIterator(T).new
-  end
-
-  private struct EmptyIterator(T)
-    include Iterator(T)
-
-    def next
-      stop
-    end
-  end
-end