Remove default width/height for static image renderers

[jonmmease]

This takes care of #2651.

Now the image size precedence is:

• width/height provided to fig.show() (e.g. `fig.show(width=700, height=400))
• width/height specified in figure (e.g. `px.scatter(..., width=800, height=500))
• default_width/default_height specified in the kaleido scope (e.g. pio.kaleido.scope.default_width)

[nicolaskruchten]

Note to self: test against #2933

thanks Jon!

[nicolaskruchten]

So we also need to set pio.kaleido.scope.default_(width|height) = None somewhere, right? because without explicitly doing that I'm still getting those defaults.

[nicolaskruchten]

Err.. I guess what I mean is that for me, pio.kaleido.scope.default_(width|height) are still taking precedence over the other two.

[jonmmease]

Huh, here's what I'm seeing:

args to show take precedence over everything:

Figure dimensions take precedence when nothing specified in show

Scope defaults take precedence when no args to show and no figure dimensions specified

[nicolaskruchten]

Hmmm that's not what I'm seeing... I pulled master and did pip install -e . and here is what I get:

[jonmmease]

Ok, I didn't try on master, just this branch, so maybe something funny is going on there.

[nicolaskruchten]

Running pip install -e . on the tip of this branch gives me the same output as I have on master... is there an uncommitted file or something here?