Remove OBE TODO

doc/TODO.md

@@ -45,30 +45,6 @@ overlays to work around. We need to add handling for the runtime errors, or figu
 why webpack-dev-server isn't understanding our error boundaries.
 
 
-### Some babel plugins
-
-```
-One of your dependencies, babel-preset-react-app, is importing the
-"@babel/plugin-proposal-private-property-in-object" package without
-declaring it in its dependencies. This is currently working because
-"@babel/plugin-proposal-private-property-in-object" is already in your
-node_modules folder for unrelated reasons, but it may break at any time.
-
-babel-preset-react-app is part of the create-react-app project, which
-is not maintianed anymore. It is thus unlikely that this bug will
-ever be fixed. Add "@babel/plugin-proposal-private-property-in-object" to
-your devDependencies to work around this error. This will make this message
-go away.
-
-$ npm i --save-dev "@babel/plugin-proposal-private-property-in-object"
-  npm WARN deprecated @babel/[email protected]: This
-  proposal has been merged to the ECMAScript standard and thus this plugin is no longer
-  maintained. Please use @babel/plugin-transform-private-property-in-object instead.
-```
-
-What do?
-
-
 ## Versioning
 
 * How to keep track of compatibility between the server (data schemas) and this app