refactor: remove checks for JS features

Since I'm introducing Svelte framework and targeting modern browsers, I
think it does not make sense to check for browser features. I can always
choose to use polyfills for backwards compatibility.

I will make sure the form is still also rendered via HTML and works for
non-SPA use.

lib/static/app/utils.js

@@ -1,5 +1,3 @@
-const useStorage = () => Boolean(window.localStorage)
-
 // NOTE: Generate random IDs: https://stackoverflow.com/a/2117523/3056783
 const uuidv4 = () => {
   return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c =>
@@ -26,5 +24,4 @@ const parseStartTimeFromiCalString = (text = '') => {
 export {
   uuidv4,
   parseStartTimeFromiCalString,
-  useStorage,
 }