Fix typo

demo/gs_train.py

@@ -139,13 +139,6 @@ def train(
     except Exception as e:
         print("Error fetching NVCC Driver Version:", e)
 
-    try:
-        import sys
-        python_version = sys.version
-        print("Python Version:", python_version)
-    except Exception as e:
-        print("Error fetching Python Version:", e)
-
     #
     # Copyright (C) 2023, Inria
     # GRAPHDECO research group, https://team.inria.fr/graphdeco