Model evaluation documentation asserts that datasetsforecast is required, but it isn't

[quant5]

Description

In many of the "Model Evaluation" sections within the statsforecast docs, it's mentioned that datasetsforecast is a required installation in order to get access to error metrics.

However, this is not the case, as one can simply import them from utilsforecast, which comes installed with statsforecast.

from utilsforecast.losses import *

My sense is that the docs would read cleaner without this additional unnecessary external install requirement. Let me know what you think.

Link

https://nixtlaverse.nixtla.io/statsforecast/docs/models/autoarima.html#model-evaluation
https://nixtlaverse.nixtla.io/statsforecast/docs/models/optimizedtheta.html#model-evaluation

And others.

[jmoralez]

I think this is closely related to #834 and would be fixed by it, should we close this one?

[quant5]

Sure, will close this one.