Stop suggesting lazy loading (#140)

It causes timing issues and is not desirable for the vast majority of applications.

lib/install/app/javascript/controllers/index_for_importmap.js

@@ -1,11 +1,4 @@
-// Import and register all your controllers from the importmap under controllers/*
-
+// Import and register all your controllers from the importmap via controllers/**/*_controller
 import { application } from "controllers/application"
-
-// Eager load all controllers defined in the import map under controllers/**/*_controller
 import { eagerLoadControllersFrom } from "@hotwired/stimulus-loading"
 eagerLoadControllersFrom("controllers", application)
-
-// Lazy load controllers as they appear in the DOM (remember not to preload controllers in import map!)
-// import { lazyLoadControllersFrom } from "@hotwired/stimulus-loading"
-// lazyLoadControllersFrom("controllers", application)