rm unnecessary test

interpolation is no longer a thing separate from "normal" assoc
conditions.

activerecord/test/cases/associations/has_many_through_associations_test.rb

@@ -813,13 +813,6 @@ def test_deleting_from_has_many_through_a_belongs_to_should_not_try_to_update_co
     assert post[:author_count].nil?
   end
 
-  def test_interpolated_conditions
-    post = posts(:welcome)
-    assert !post.tags.empty?
-    assert_equal post.tags, post.interpolated_tags
-    assert_equal post.tags, post.interpolated_tags_2
-  end
-
   def test_primary_key_option_on_source
     post     = posts(:welcome)
     category = categories(:general)

activerecord/test/models/post.rb

@@ -70,10 +70,6 @@ def add_joins_and_select
     end
   end
 
-  has_many :interpolated_taggings, -> { where "1 = #{1}" }, :class_name => 'Tagging', :as => :taggable
-  has_many :interpolated_tags, :through => :taggings
-  has_many :interpolated_tags_2, :through => :interpolated_taggings, :source => :tag
-
   has_many :taggings_with_delete_all, :class_name => 'Tagging', :as => :taggable, :dependent => :delete_all
   has_many :taggings_with_destroy, :class_name => 'Tagging', :as => :taggable, :dependent => :destroy
 

activerecord/test/models/tagging.rb

@@ -8,7 +8,6 @@ class Tagging < ActiveRecord::Base
   belongs_to :invalid_tag, :class_name => 'Tag', :foreign_key => 'tag_id'
   belongs_to :blue_tag, -> { where :tags => { :name => 'Blue' } }, :class_name => 'Tag', :foreign_key => :tag_id
   belongs_to :tag_with_primary_key, :class_name => 'Tag', :foreign_key => :tag_id, :primary_key => :custom_primary_key
-  belongs_to :interpolated_tag, -> { where "1 = #{1}" }, :class_name => 'Tag', :foreign_key => :tag_id
   belongs_to :taggable, :polymorphic => true, :counter_cache => true
   has_many :things, :through => :taggable
 end