Remove Quandl from LEAN (#6110)

* Remove Quandl from LEAN

* Nit changes and CustomLiveDataFeedTests.cs

* Resolve conflicts

* Remove files related with Quandl

* Fix bug

* Fix QuantBookHistoryTests.cs

* Fix bug

* Fix bug

* Fix unit tests

* Try fix regression tests

* Nit changes

* Fix bug

* Some of the requested changes

* The missing changes

* Requested changes

* Nit changes

* Revert "Nit changes"

This reverts commit 9800bc5c34f3ac20e30bea7a92dd4a9867213bb5.

* Nit changes

* Fix bug

* Requested changes

* Missing file using Quandl to be removed

* Nit changes

* Not applied nit change

* Nit change

* Nit change

* Add nasdaq-auth-code parameter in config.json

* Remove 'quandl-auth-token' from config.json

Co-authored-by: Martin-Molinero <martin@quantconnect.com>

Algorithm.Python/QuantConnect.Algorithm.Python.csproj

@@ -222,8 +222,6 @@
     <None Include="OptionSplitRegressionAlgorithm.py" />
     <None Include="OrderTicketDemoAlgorithm.py" />
     <None Include="ParameterizedAlgorithm.py" />
-    <None Include="QuandlFuturesDataAlgorithm.py" />
-    <None Include="QuandlImporterAlgorithm.py" />
     <None Include="readme.md" />
     <None Include="RawPricesCoarseUniverseAlgorithm.py" />
     <None Include="RegressionAlgorithm.py" />