removed some things

[btopro]

20/20
Overview:
Nice work getting chain selectors working to do deep querying in the shadowRoot's for automated testing
and reasonable tests (5 of them). The stories look good and you did all of them so +1 there. Initial look
at the card is visually clean and supports 3 different types that match the comp (purple might be diff color but meh).

topText and bottomText can't be changed by the user which is unfortunate and is not translatable or able to
be changed via slots. <h1 slot="top-header">${this.topText}</h1> in learning-banner does nothing for example
as you'd need <h1><slot name="top-header">.... as well as compositing for it to pass down. You do get compositing
correct elsewhere but shoot for users being able to override the implementation to set slot="..." in the demo /
top level element.

Overall looks correct, nothing fancy but gets the job done and very little code to remove. Also watch for
blank ...super.properties statements when there's nothing being extending as well as empty methods that
just call super.whatever.

PR:


Detail breakdown:
-.5 for no named slots at top level for implementing in design
-.5 properties can't update the title headings
+1 for stories for all elements correctly