tb_log_hist_steps is misplaced in the Tensorboard writer

[shatu]

tb_log_hist_steps seems to be misplaced in the Tensorboard writer. A good design principle here in my opinion should be to just let the writer write out the logs, and control the frequency of writing through the stats and trainer/trainer_backend classes. This is already followed for other types of logging, and should be used consistently for writing out the histograms through tensorboard as well.

PyMarlin/pymarlin/utils/writer/tensorboard.py

Line 143 in fb8bbc9

if step % self.args.tb_log_hist_steps == 0: