Get rid of hack for freezing time on AR tests

We can now make use of the existent #travel/#travel_to helper methods
added to AS test case and available in all tests.

activerecord/test/cases/helper.rb

@@ -149,23 +149,6 @@ def load_schema
 
 load_schema
 
-class << Time
-  unless method_defined? :now_before_time_travel
-    alias_method :now_before_time_travel, :now
-  end
-
-  def now
-    (@now ||= nil) || now_before_time_travel
-  end
-
-  def travel_to(time, &block)
-    @now = time
-    block.call
-  ensure
-    @now = nil
-  end
-end
-
 class SQLSubscriber
   attr_reader :logged
   attr_reader :payloads
@@ -183,7 +166,6 @@ def start(name, id, payload)
   def finish(name, id, payload); end
 end
 
-
 module InTimeZone
   private
 

activerecord/test/cases/migration_test.rb

@@ -743,7 +743,7 @@ def test_copying_migrations_with_timestamps
     @migrations_path = MIGRATIONS_ROOT + "/valid_with_timestamps"
     @existing_migrations = Dir[@migrations_path + "/*.rb"]
 
-    Time.travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
+    travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
       copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
       assert File.exist?(@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb")
       assert File.exist?(@migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb")
@@ -768,7 +768,7 @@ def test_copying_migrations_with_timestamps_from_2_sources
     sources[:bukkits] = MIGRATIONS_ROOT + "/to_copy_with_timestamps"
     sources[:omg]     = MIGRATIONS_ROOT + "/to_copy_with_timestamps2"
 
-    Time.travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
+    travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
       copied = ActiveRecord::Migration.copy(@migrations_path, sources)
       assert File.exist?(@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb")
       assert File.exist?(@migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb")
@@ -788,7 +788,7 @@ def test_copying_migrations_with_timestamps_to_destination_with_timestamps_in_fu
     @migrations_path = MIGRATIONS_ROOT + "/valid_with_timestamps"
     @existing_migrations = Dir[@migrations_path + "/*.rb"]
 
-    Time.travel_to(Time.utc(2010, 2, 20, 10, 10, 10)) do
+    travel_to(Time.utc(2010, 2, 20, 10, 10, 10)) do
       ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
       assert File.exist?(@migrations_path + "/20100301010102_people_have_hobbies.bukkits.rb")
       assert File.exist?(@migrations_path + "/20100301010103_people_have_descriptions.bukkits.rb")
@@ -863,7 +863,7 @@ def test_copying_migrations_to_non_existing_directory
     @migrations_path = MIGRATIONS_ROOT + "/non_existing"
     @existing_migrations = []
 
-    Time.travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
+    travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
       copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
       assert File.exist?(@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb")
       assert File.exist?(@migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb")
@@ -878,7 +878,7 @@ def test_copying_migrations_to_empty_directory
     @migrations_path = MIGRATIONS_ROOT + "/empty"
     @existing_migrations = []
 
-    Time.travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
+    travel_to(Time.utc(2010, 7, 26, 10, 10, 10)) do
       copied = ActiveRecord::Migration.copy(@migrations_path, {:bukkits => MIGRATIONS_ROOT + "/to_copy_with_timestamps"})
       assert File.exist?(@migrations_path + "/20100726101010_people_have_hobbies.bukkits.rb")
       assert File.exist?(@migrations_path + "/20100726101011_people_have_descriptions.bukkits.rb")