Andrew Overton b205164477 Delete obsolete markdown files
As I've gone through and replaced all the READMEs I haven't always been good at deleting the markdown files that were stitched together to make the old READMEs. This PR removes all the ones I forgot to remove. All the relevant material in these files is already in the new READMEs, so we're not losing anything by doing this.

Closes https://github.com/material-components/material-components-ios/pull/10029

COPYBARA_INTEGRATE_REVIEW=https://github.com/material-components/material-components-ios/pull/10029 from andrewoverton:delete-unused-docs 65ea55253af300ea7a4c13ea4ce14976097a6253
PiperOrigin-RevId: 318079032
2020-06-24 09:31:01 -07:00
..
2020-04-29 14:32:52 -07:00