Refactor to remove slices and environments, replace with instances.

routes/web.php

@@ -1,7 +1,6 @@
 <?php
 
 use App\Http\Controllers\ApplicationController;
-use App\Http\Controllers\EnvironmentController;
 use App\Http\Controllers\OrganisationController;
 use App\Http\Controllers\ProvisionCallback;
 use App\Http\Controllers\ProvisionScript;
@@ -39,12 +38,6 @@ Route::middleware(['auth', 'verified'])->group(function () {
             ->only('show', 'index')
             ->name('index', 'applications.index')
             ->name('show', 'applications.show');
-
-        Route::prefix('applications/{application}')->group(function () {
-            Route::resource('environments', EnvironmentController::class)
-                ->only('show')
-                ->name('show', 'environments.show');
-        });
     });
 });