1 files changed, 0 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 7ae9bd9a5f..541013c1e7 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -314,12 +314,6 @@ module ActiveRecord
         postgresql_version >= 90400
       end
 
-      def supports_alter_constraint?
-        # PostgreSQL 9.4 introduces ALTER TABLE ... ALTER CONSTRAINT but it has a bug and fixed in 9.4.2
-        # https://www.postgresql.org/docs/9.4/static/release-9-4-2.html
-        postgresql_version >= 90402
-      end
-
       def get_advisory_lock(lock_id) # :nodoc:
         unless lock_id.is_a?(Integer) && lock_id.bit_length <= 63
           raise(ArgumentError, "Postgres requires advisory lock ids to be a signed 64 bit integer")