Two Different Buffers Are Used On LaMAML Strategy

[AlboAlby00]

I think that there is a mistake in the lamaml.py files.
The LaMAML Strategy is still using a ReplayPlugin, but after switching from lamaml to lamaml_v2, the buffer should already be handled internally by the LaMAML strategy, and the plugin is adding an additional buffer that is not supposed to exist.
I think the ReplayPlugin should be removed.
If someone can confirm this is the case, I can quickly fix the problem.

[AlboAlby00]

Removing the ReplayPlugin improved the final accuracy from 0.66 to 0.695 on the SplitCifar100 benchmark. I am 90% confident that this is actually a bug. I created a PR to fix this.