Update example proxy list

Author: mdmintz

seleniumbase/config/proxy_list.py

@@ -20,8 +20,7 @@
 
 PROXY_LIST = {
     "example1": "104.236.248.219:3128",  # (Example) - set your own proxy here
-    "example2": "81.4.255.25:3128",  # (Example) - set your own proxy here
-    "example3": "52.187.121.7:3128",  # (Example) - set your own proxy here
+    "example2": "52.187.121.7:3128",  # (Example) - set your own proxy here
     "proxy1": None,
     "proxy2": None,
     "proxy3": None,