Remove PropTypes from all files and package.json

Summary: I also tried to make the types ReadOnly and Exact where I could

Test Plan: Ran cleaninstall in order to test without the PropTypes package, also tested basic functions of the app.

Reviewers: palys-swm, ashoat, atul

Reviewed By: ashoat

Subscribers: ashoat, KatPo, zrebcu411, Adrian, atul

Differential Revision: https://phabricator.ashoat.com/D928