Remove orjson stubs (#7410)

stubs/orjson/METADATA.toml

@@ -1,2 +0,0 @@
-version = "3.6.*"
-obsolete_since = "3.6.1"

stubs/orjson/orjson.pyi

@@ -1,25 +0,0 @@
-from collections.abc import Callable
-from typing import Any
-
-__version__: str
-
-def dumps(__obj: Any, default: Callable[[Any], Any] | None = ..., option: int | None = ...) -> bytes: ...
-def loads(__obj: bytes | str) -> Any: ...
-
-class JSONDecodeError(ValueError): ...
-class JSONEncodeError(TypeError): ...
-
-OPT_APPEND_NEWLINE: int
-OPT_INDENT_2: int
-OPT_NAIVE_UTC: int
-OPT_NON_STR_KEYS: int
-OPT_OMIT_MICROSECONDS: int
-OPT_PASSTHROUGH_DATACLASS: int
-OPT_PASSTHROUGH_DATETIME: int
-OPT_PASSTHROUGH_SUBCLASS: int
-OPT_SERIALIZE_DATACLASS: int
-OPT_SERIALIZE_NUMPY: int
-OPT_SERIALIZE_UUID: int
-OPT_SORT_KEYS: int
-OPT_STRICT_INTEGER: int
-OPT_UTC_Z: int