diff --git a/NanoVNASaver/RFTools.py b/NanoVNASaver/RFTools.py
index 6297744..730cb1d 100644
--- a/NanoVNASaver/RFTools.py
+++ b/NanoVNASaver/RFTools.py
@@ -18,7 +18,6 @@ import math
 import cmath
 from numbers import Number, Real
 from typing import List, NamedTuple
-upstream_Development
 from NanoVNASaver.SITools import Value, Format