Make JSXFromHTML stateless

[RafalFilipek]

After last changes where I made JSXFromHTML synchronous there no reason to keep componentDidMount etc. In fact we can make this component stateless.

Props:

• less code

Cons:

• ?

[jaredpalmer]

What happens if htmlparser2 fails? What does it return?

[RafalFilipek]

Good question. should be an empty array IMO. I was trying to generate some error with invalid HTML but no luck. I will look into htmlparser2 tests.