fix readme

readme.md

@@ -468,16 +468,6 @@ $post->title = 'New Post Title';
 $post->save();
 ```
 
-##### Mass Updates
-
-Updates can also be performed against any number of models that match a given query. In this example, all posts that are active and have a views lower than 5 will be marked as archived:
-
-```php
-App\post::where('active', 1)
-          ->where('views', "<", 5)
-          ->update(['archived' => 1]);
-```
-
 ##### Deleting Models
 
 To delete a model, call the `delete()` method on a model instance:
@@ -488,14 +478,6 @@ $post = App\Post::find(1);
 $post->delete();
 ```
 
-##### Deleting Models By Query
-
-Of course, you may also run a delete statement on a set of models. In this example, we will delete all posts that are marked as inactive. Like mass updates:
-
-```php
-$deletedDocuments = App\Post::where('active', 0)->delete();
-```
-
 ##### Query Scopes
 
 Scopes allow you to define common sets of constraints that you may easily re-use throughout your application. For example, you may need to frequently retrieve all posts that are considered "popular". To define a scope, simply prefix an Eloquent model method with scope.