diff --git a/vyper/semantics/types/bytestrings.py b/vyper/semantics/types/bytestrings.py
index 4872561534..e4d3da74a4 100644
--- a/vyper/semantics/types/bytestrings.py
+++ b/vyper/semantics/types/bytestrings.py
@@ -1,5 +1,3 @@
-from typing import Optional
-
 from vyper import ast as vy_ast
 from vyper.abi_types import ABI_Bytes, ABI_String, ABIType
 from vyper.exceptions import CompilerPanic, StructureException, UnexpectedNodeType, UnexpectedValue