Merge pull request #26376 from kamipo/remove_polymorphic_base_class_for_array

Remove extracting `polymorphic_base_class` for `Array` in `AssociationQueryValue`

activerecord/lib/active_record/relation/predicate_builder/association_query_handler.rb

@@ -70,9 +70,6 @@ def polymorphic_base_class_from_value
           case value
           when Relation
             value.klass.base_class
-          when Array
-            val = value.compact.first
-            val.class.base_class if val.is_a?(Base)
           when Base
             value.class.base_class
           end