Drop the Retro Logo

[jtpio]

Problem

As we make progress towards RetroLab becoming Notebook 7, we should consider dropping the RetroLab logo, which can be enabled here:

retrolab/retrolab/app.py

Lines 203 to 205 in 1ad349a

	retro_logo = Bool(
	False, config=True, help="Whether to use the RetroLab inline logo."
	)

Proposed Solution

We remove support for the retro logo here:

retrolab/retrolab/app.py

Lines 203 to 205 in 1ad349a

	retro_logo = Bool(
	False, config=True, help="Whether to use the RetroLab inline logo."
	)

And the handling of that option here:

retrolab/packages/application-extension/src/index.ts

Lines 140 to 141 in 49b9ae3

	const retroLogo = PageConfig.getOption('retroLogo') === 'true';
	const icon = retroLogo ? retroInlineIcon : jupyterIcon;

Additional context

This was originally added in #131.

So the logo would be displayed in the top area: