Resolve infinite loop when removing a datasource from the realtime data synchronizer

[philip-khaisman]

The TimeSeriesRealtimeDatasource.removeDataSynchronizer method was calling DataSynchronizerRealtime.removeDataSource method which then called TimeSeriesRealtimeDatasource.removeDataSynchronizer which then called the DataSynchronizerRealtime.removeDataSource method...ok you get the picture.

This bug was called out in the TimeSeriesReplayDatasource class so removed the offending cal as was done there.

Test

• I verified the fix with the webtak plugin when i refactored realtime mode to use the data synchronizer but i later learned that we weren't using the data synchronizer on purpose. So testing this now will be annoying. I think it's an obvious enough change to review logically with the knowledge that it did work as expected when i was using the data synchronizer in realtime mode