remove irrelevant references to ARel

guides/source/active_record_querying.textile

@@ -979,9 +979,9 @@ If, in the case of this +includes+ query, there were no comments for any posts,
 
 h3. Scopes
 
-Scoping allows you to specify commonly-used ARel queries which can be referenced as method calls on the association objects or models. With these scopes, you can use every method previously covered such as +where+, +joins+ and +includes+. All scope methods will return an +ActiveRecord::Relation+ object which will allow for further methods (such as other scopes) to be called on it.
+Scoping allows you to specify commonly-used queries which can be referenced as method calls on the association objects or models. With these scopes, you can use every method previously covered such as +where+, +joins+ and +includes+. All scope methods will return an +ActiveRecord::Relation+ object which will allow for further methods (such as other scopes) to be called on it.
 
-To define a simple scope, we use the +scope+ method inside the class, passing the ARel query that we'd like run when this scope is called:
+To define a simple scope, we use the +scope+ method inside the class, passing the query that we'd like run when this scope is called:
 
 <ruby>
 class Post < ActiveRecord::Base