AR atomic scenarios internals doc fix.

docs/internals/ar.md

@@ -10,25 +10,13 @@ All possible scenario formats supported by ActiveRecord:
 public function scenarios()
 {
     return array(
-        // 1. attributes array
+        // attributes array, all operations won't be wrapped with transaction
         'scenario1' => array('attribute1', 'attribute2'),
 
-        // 2. insert, update and delete operations won't be wrapped with transaction (default mode)
+        // insert and update operations will be wrapped with transaction, delete won't be wrapped
         'scenario2' => array(
             'attributes' => array('attribute1', 'attribute2'),
-            'atomic' => array(), // default value
-        ),
-
-        // 3. insert and update operations will be wrapped with transaction, delete won't be wrapped
-        'scenario4' => array(
-            'attributes' => array('attribute1', 'attribute2'),
-            'atomic' => array(self::OPERATION_INSERT, self::OPERATION_UPDATE),
-        ),
-
-        // 5. insert and update operations won't be wrapped with transaction, delete will be wrapped
-        'scenario5' => array(
-            'attributes' => array('attribute1', 'attribute2'),
-            'atomic' => array(self::OPERATION_DELETE),
+            'atomic' => array(self::OP_INSERT, self::OP_UPDATE),
         ),
     );
 }