deps: remove **/node_modules/form-data/README.md

Having multiple files with the same name but different casings causes
problems on lots of OS-s.

Refs: https://github.com/nodejs/node/issues/12624
Refs: https://github.com/nodejs/node/pull/11085
Refs: https://github.com/nodejs/node/pull/11020

PR-URL: https://github.com/nodejs/node/pull/12643


Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Alexey Orlenko <eaglexrlnk@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>