Remove old-style loggers

[jwaa]

Is your feature request related to a problem? Please describe.
As of v2.1.0 the old logger classes are deprecated, to be replaced by GridWorldLoggerV2 and others. These new loggers included the world state as a State argument, simplifying the implementation of new loggers.

Describe the solution you would like
The old logger classes need to be removed, and the GridWorldLoggerV2 need to become deprecated and renamed to GridWorldLogger. Similar for all other default loggers as well. In a future release then GridWorldLoggerV2 can then be removed again.

Describe alternatives you have considered
N/A

Additional context
The loggers were changed for #202