Remove react autobind (#1254)

## Launch Checklist

<!-- Thanks for the PR! Feel free to add or remove items from the
checklist. -->
Remove react-autobind dependency

 - [x] Briefly describe the changes in this PR.
 - [ ] Link to related issues.
- [ ] Include before/after visuals or gifs if this PR includes visual
changes.
 - [ ] Write tests for all new functionality.
 - [x] Add an entry to `CHANGELOG.md` under the `## main` section.

src/components/App.tsx

@@ -1,5 +1,3 @@
-// @ts-ignore - this can be easily replaced with arrow functions
-import autoBind from 'react-autobind';
 import React from 'react'
 import cloneDeep from 'lodash.clonedeep'
 import clamp from 'lodash.clamp'
@@ -140,7 +138,6 @@ export default class App extends React.Component<any, AppState> {
 
   constructor(props: any) {
     super(props)
-    autoBind(this);
 
     this.revisionStore = new RevisionStore()
     const params = new URLSearchParams(window.location.search.substring(1))