Remove react-is dependency

[iamhosseindhv]

No description provided.

[oliviertassinari]

react-is has a high adoption rate in the react community. I think that removing it and inlining the helpers:

• forces to use React internals, which can break
• increase bundle size in the application as the logic can no longer be deduplicated

[oliviertassinari]

One alternative is to use

import { getDisplayName } from '@material-ui/utils';

it shouldn't be used in production anyway, I would hope it's tree shaked.