Remove styled-components dependency

[SpicyPete]

As amazing as styled-components are, not everyone uses it.
As such, having it as a requirement to use these components is adding un-needed package size bloat.

Since the core of these components is the BadgerBase higher-order-component, we should keep the size as minimal as possible.
If we want to build complex components using styled-components we may create a separate package for those in the future.