Remove coerced test no longer in Rails test suite (#895)

Co-authored-by: Aidan Haran <aharan@fusioneer.com>

Author: aidanharan

test/cases/coerced_tests.rb

@@ -28,9 +28,6 @@ def test_validate_uniqueness_with_limit_and_utf8_coerced
 require "models/event"
 module ActiveRecord
   class AdapterTest < ActiveRecord::TestCase
-    # I really don`t think we can support legacy binds.
-    coerce_tests! :test_insert_update_delete_with_legacy_binds
-
     # As far as I can tell, SQL Server does not support null bytes in strings.
     coerce_tests! :test_update_prepared_statement