remove unused schema from constraint test

Author: petermueller

integration_test/myxql/constraints_test.exs

@@ -106,16 +106,6 @@ defmodule Ecto.Integration.ConstraintsTest do
     end
   end
 
-  defmodule CustomConstraint do
-    use Ecto.Integration.Schema
-
-    schema "procedure_constraints_test" do
-      field :member_id, :integer
-      field :started_at, :utc_datetime_usec
-      field :ended_at, :utc_datetime_usec
-    end
-  end
-
   @base_migration 2_000_000
 
   setup_all do
@@ -213,8 +203,6 @@ defmodule Ecto.Integration.ConstraintsTest do
     assert exception.message =~ "The changeset has not defined any constraint."
     assert exception.message =~ "call `exclusion_constraint/3`"
 
-    #####
-
     # When the changeset does expect the db error
     # but the key does not match the default generated by `exclusion_constraint`
     exception =