Remove usage of PHP alias in the Python client

[rzats]

Secondary PR to cmu-delphi/delphi-epidata#1288 that should be merged & deployed alongside it - fixes breaking changes caused by the transition from "compatibility mode" / api.php in the Delphi Python client.

[melange396]

You should pin the version of the delphi-epidata package here too, as done in cmu-delphi/covidcast#663. Im guessing the usage of that package in "nowcast/" is luckily covered by inheriting from a line in hhs_hosp/setup.py, but nowcast/setup.py should have its own pin too.

[melange396]

It looks like maybe you didnt get to run tests for this with the updated client from cmu-delphi/delphi-epidata#1288 ? Im pretty sure youll need to update the args to assert_called_once_with() for the @patched async_epidata():

covidcast-indicators/nowcast/tests/test_epidata.py

Lines 37 to 38 in 3666fa6

	mock_epidata.assert_called_once_with([
	{"source": "covidcast",

[melange396]

since we changed cmu-delphi/delphi-epidata#1288 to preserve the function signature of async_epidata(), shall we just abandon this PR?