ref: remove unnecssary metaclass (#91906)

`@Christinarlong` and I found this at pycon

<!-- Describe your PR here. -->

Author: asottile-sentry

src/sentry/hybridcloud/rpc/__init__.py

@@ -5,7 +5,7 @@
 import threading
 from collections.abc import Callable, Iterable, Mapping
 from enum import Enum
-from typing import Any, Generic, Protocol, Self, TypeVar, cast
+from typing import Any, Generic, Self, TypeVar, cast
 
 import pydantic
 from django.db import router, transaction
@@ -99,10 +99,6 @@ def serialize_by_field_name(
         return cls(**fields)
 
 
-class RpcModelProtocolMeta(type(RpcModel), type(Protocol)):  # type: ignore[misc]
-    """A unifying metaclass for RpcModel classes that also implement a Protocol."""
-
-
 ServiceInterface = TypeVar("ServiceInterface")
 
 

src/sentry/sentry_apps/services/app/model.py

@@ -12,7 +12,7 @@
 from pydantic.fields import Field
 
 from sentry.constants import SentryAppInstallationStatus
-from sentry.hybridcloud.rpc import RpcModel, RpcModelProtocolMeta
+from sentry.hybridcloud.rpc import RpcModel
 from sentry.sentry_apps.utils.errors import SentryAppErrorType
 
 
@@ -124,7 +124,7 @@ def actionType(self) -> str: ...
     def is_enabled(self) -> bool: ...
 
 
-class RpcSentryAppEventData(RpcModel, metaclass=RpcModelProtocolMeta):
+class RpcSentryAppEventData(RpcModel):
     id: str = ""
     label: str = ""
     action_type: str = ""