don't set attributes on composed schema

Author: zippolyte

.generator/templates/model_templates/method_from_openapi_data_composed.mustache

@@ -54,13 +54,4 @@
         self._additional_properties_model_instances = composed_info[2]
         discarded_args = composed_info[3]
 
-        for var_name, var_value in kwargs.items():
-            if var_name in discarded_args and \
-                        self._configuration is not None and \
-                        self._configuration.discard_unknown_keys and \
-                        self._additional_properties_model_instances:
-                # discard variable.
-                continue
-            setattr(self, var_name, var_value)
-
         return self

.generator/templates/model_templates/method_init_composed.mustache

@@ -66,15 +66,3 @@
         self._var_name_to_model_instances = composed_info[1]
         self._additional_properties_model_instances = composed_info[2]
         discarded_args = composed_info[3]
-
-        for var_name, var_value in kwargs.items():
-            if var_name in discarded_args and \
-                        self._configuration is not None and \
-                        self._configuration.discard_unknown_keys and \
-                        self._additional_properties_model_instances:
-                # discard variable.
-                continue
-            setattr(self, var_name, var_value)
-            if var_name in self.read_only_vars:
-                raise ApiAttributeError(f"`{var_name}` is a read-only attribute. Use `from_openapi_data` to instantiate "
-                                     f"class with read only attributes.")