Remove old pre-1.0 upgrading instructions

readme.md

@@ -3,14 +3,3 @@
 Simple static sites with Laravel's [Blade](https://laravel.com/docs/blade).
 
 For documentation, visit https://jigsaw.tighten.co/docs/installation/
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-### Upgrading from an earlier version?
-
-__Version 1.0 includes a change to the way site variables are referenced in your templates.__
-
-Site variables defined in `config.php`, as well as any variables defined in the YAML front matter of a page, are now accessible under the `$page` object, rather than by referencing the variable name itself. Blade templates that include variables will need to be updated so that all variables are prefixed with `$page->`.
-
-Check out https://jigsaw.tighten.co/docs/upgrading/ for an example.
-