py/test/webdriver/network.py: remove python 2 code

Author: Delta456

py/test/selenium/webdriver/common/network.py

@@ -25,10 +25,7 @@
 
     def get_interface_ip(ifname):
         def _bytes(value, encoding):
-            try:
-                return bytes(value, encoding)  # Python 3
-            except TypeError:
-                return value  # Python 2
+            return bytes(value, encoding)
 
         sckt = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
         return socket.inet_ntoa(