Remove deprecated String constructor from ActiveRecord::Migrator.

activerecord/CHANGELOG.md

@@ -1,3 +1,7 @@
+*   Remove deprecated String constructor from `ActiveRecord::Migrator`.
+
+    *Yves Senn*
+
 *   Remove deprecated `scope` use without passing a callable object.
 
     *Arun Agrawal*

activerecord/lib/active_record/migration.rb

@@ -869,9 +869,6 @@ module ActiveRecord
 
       if Array(migrations).grep(String).empty?
         @migrations = migrations
-      else
-        ActiveSupport::Deprecation.warn "instantiate this class with a list of migrations"
-        @migrations = self.class.migrations(migrations)
       end
 
       validate(@migrations)

activerecord/test/cases/migrator_test.rb

@@ -91,12 +91,6 @@ module ActiveRecord
       assert_equal 'AddExpressions', migrations[0].name
     end
 
-    def test_deprecated_constructor
-      assert_deprecated do
-        ActiveRecord::Migrator.new(:up, MIGRATIONS_ROOT + "/valid")
-      end
-    end
-
     def test_relative_migrations
       list = Dir.chdir(MIGRATIONS_ROOT) do
         ActiveRecord::Migrator.migrations("valid/")