Supress warnings for deprecated shapes

[jjant]

We still support a bunch of deprecated shapes (EnumShape EnumTrait, SetShape), and these generate a lot of warnings while building.

[jdisanti]

Did you mean EnumTrait? EnumShape is the new shininess.

I think we actually have a path forward to stop referencing both of these in our code. SetShape extends ListShape, so we can just stop matching on it entirely.

[82marbag]

For enums: #1932 (waiting for a conversation with the smithy team to be resolved)

I'll cut one for sets

[jjant]

Yes, I meant EnumTrait! Good catch.

We can't remove all references of SetShape afaik, because things like

override fun setShape(shape: SetShape) {}

don't compile if you replace that with ListShape.

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Edit: Looks like the default impl for setShape just invokes listShape so we can probably just remove our overrides in our visitors 🤔.

[jdisanti]

Duplicate of #1670