fixing test warnings

activerecord/test/cases/identity_map_test.rb

@@ -137,8 +137,6 @@ def test_loading_new_instance_should_not_update_dirty_attributes
     assert_equal(["name"], swistak.changed)
     assert_equal({"name" => ["Marcin Raczkowski", "Swistak Sreberkowiec"]}, swistak.changes)
 
-    s = Subscriber.find('swistak')
-
     assert swistak.name_changed?
     assert_equal("Swistak Sreberkowiec", swistak.name)
   end
@@ -149,8 +147,6 @@ def test_loading_new_instance_should_change_dirty_attribute_original_value
 
     Subscriber.update_all({:name => "Raczkowski Marcin"}, {:name => "Marcin Raczkowski"})
 
-    s = Subscriber.find('swistak')
-
     assert_equal({"name"=>["Marcin Raczkowski", "Swistak Sreberkowiec"]}, swistak.changes)
     assert_equal("Swistak Sreberkowiec", swistak.name)
   end
@@ -163,8 +159,6 @@ def test_loading_new_instance_should_remove_dirt
 
     Subscriber.update_all({:name => "Swistak Sreberkowiec"}, {:name => "Marcin Raczkowski"})
 
-    s = Subscriber.find('swistak')
-
     assert_equal("Swistak Sreberkowiec", swistak.name)
     assert_equal({"name"=>["Marcin Raczkowski", "Swistak Sreberkowiec"]}, swistak.changes)
     assert swistak.name_changed?
@@ -175,7 +169,7 @@ def test_has_many_associations
     pirate.birds.create!(:name => 'Posideons Killer')
     pirate.birds.create!(:name => 'Killer bandita Dionne')
 
-    posideons, killer = pirate.birds
+    posideons, _ = pirate.birds
 
     pirate.reload