Remove `color: undefined` from wrapStyle (#14728)
Remove `color: undefined` from wrapStyle (#14728)

The new markdown uses fewer container components, so it doesn't need
this "neutral" style like the old markdown did. Having it there caused
the component to fallback to black_100.
keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client