Improve EMC config validations

tests/rpc/test_rpc_emc.py

@@ -11,7 +11,6 @@ import pytest
 import websockets
 
 from freqtrade.data.dataprovider import DataProvider
-from freqtrade.exceptions import OperationalException
 from freqtrade.rpc.external_message_consumer import ExternalMessageConsumer
 from tests.conftest import log_has, log_has_re, log_has_when
 
@@ -73,23 +72,12 @@ def test_emc_shutdown(patched_emc, caplog):
     assert not log_has("Stopping ExternalMessageConsumer", caplog)
 
 
-def test_emc_init(patched_emc, default_conf):
+def test_emc_init(patched_emc):
     # Test the settings were set correctly
     assert patched_emc.initial_candle_limit <= 1500
     assert patched_emc.wait_timeout > 0
     assert patched_emc.sleep_time > 0
 
-    default_conf.update({
-        "external_message_consumer": {
-            "enabled": True,
-            "producers": []
-        }
-    })
-    dataprovider = DataProvider(default_conf, None, None, None)
-    with pytest.raises(OperationalException,
-                       match="You must specify at least 1 Producer to connect to."):
-        ExternalMessageConsumer(default_conf, dataprovider)
-
 
 # Parametrize this?
 def test_emc_handle_producer_message(patched_emc, caplog, ohlcv_history):