Remove beam logging in playground for Python

[hjtran]

I get a lot of complaints about all the logging in Beam playground for python examples. It really drowns out any output that might be coming from the examples.

I attempted to just remove the logging altogether for the python examples here, though I have no way of testing it.

My rationale is that the Beam playground environment doesn't really make sense to have logging for. If something goes wrong with an example, it makes a lot more sense to just copy and paste the example into your local Beam environment and debug it there (and optionally turn on logging in your own environment).