bug ens contract function called twice

[dbfreem]

I was looking at what it would take to async resolver in ENS so that it could be used in the name_to_address_middleware when I noticed the below. Feel free to close this issue if I am overlooking something but I am putting in a PR to remove the second call.

In the main.py module for ens the contract function is called twice. Once on line 245 and again on line 248.

[fselmo]

closed by #2319