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/storage.js

@@ -1,5 +1,3 @@
-import { useStorage } from './utils'
-
 const migrateRecord = (record) => {
   // NOTE: v3 records
   const id = record.id || record.order
@@ -13,10 +11,6 @@ const migrateRecord = (record) => {
 }
 
 const getStorage = () => {
-  if (!useStorage()) {
-    return null
-  }
-
   const storage = localStorage.getItem('fb-to-ical-events')
 
   if (!storage) {
@@ -28,10 +22,6 @@ const getStorage = () => {
 }
 
 const getConfigStorage = () => {
-  if (!useStorage()) {
-    return null
-  }
-
   const storage = localStorage.getItem('fb-to-ical-config')
 
   if (!storage) {
@@ -62,10 +52,6 @@ const updateConfigStorage = (storageContents, key, value) => {
 }
 
 const saveRecord = ({ id, link, createdAt, startTime, title }) => {
-  if (!useStorage()) {
-    return
-  }
-
   const storage = getStorage()
   const storageContents = getStorageContents(storage)
 
@@ -81,10 +67,6 @@ const saveRecord = ({ id, link, createdAt, startTime, title }) => {
 }
 
 const deleteRecord = (id) => {
-  if (!useStorage()) {
-    return
-  }
-
   const storage = getStorage()
   const storageContents = getStorageContents(storage)
   const index = storageContents.findIndex((record) => {