code gardening: removes redundant selfs

A few have been left for aesthetic reasons, but have made a pass
and removed most of them.

Note that if the method `foo` returns an array, `foo << 1`
is a regular push, nothing to do with assignments, so
no self required.

1 files changed, 2 insertions, 2 deletions

diff --git a/railties/lib/rails/generators/generated_attribute.rb b/railties/lib/rails/generators/generated_attribute.rb
index 58ffdcc464..61181b7b97 100644
--- a/railties/lib/rails/generators/generated_attribute.rb
+++ b/railties/lib/rails/generators/generated_attribute.rb
@@ -127,11 +127,11 @@ module Rails
       end
 
       def polymorphic?
-        self.attr_options[:polymorphic]
+        attr_options[:polymorphic]
       end
 
       def required?
-        self.attr_options[:required]
+        attr_options[:required]
       end
 
       def has_index?