Did cleaning of code, remove time module

Change function name from uppercase to lowercase

Python_script/VNA.py

 #!/usr/bin/python3
 
 import pyvisa
-import time
 from VNA_dummy import VnaDummy
 
-def create_VNA(hostname):
+
+def create_vna(hostname):
     if hostname == 'localhost':
         return VnaDummy(hostname)
     else:
         return Vna(hostname)
 
+
 class Vna:
     def __init__(self, ip_address):
         """