remove const_defined? check

lib/has_aux_table.rb

@@ -8,6 +8,7 @@ require "active_support"
 require "active_support/concern"
 require "active_model/attribute_set"
 
+require_relative "has_aux_table/version"
 require_relative "has_aux_table/key_type"
 require_relative "has_aux_table/util"
 require_relative "has_aux_table/relation_extensions"
@@ -82,11 +83,6 @@ module HasAuxTable
       aux_class_name = aux_table_name.to_s.camelize
       aux_association_name = aux_table_name.to_s.singularize.to_sym
 
-      # Ensure the class name doesn't conflict with existing constants
-      if Object.const_defined?(aux_class_name)
-        Kernel.raise ArgumentError, "Class #{aux_class_name} already exists"
-      end
-
       # Get the current class for the association
       main_class = T.cast(self, T.class_of(ActiveRecord::Base))
       main_association_name = foreign_key.to_s.delete_suffix("_id").to_sym