Fix frozen build

core/src/trezor/wire/thp/thp_messages.py

@@ -1,5 +1,4 @@
 import ustruct  # pyright:ignore[reportMissingModuleSource]
-from typing import TYPE_CHECKING  # pyright: ignore[reportShadowedImports]
 
 from storage.cache_thp import BROADCAST_CHANNEL_ID
 from trezor import protobuf
@@ -7,9 +6,6 @@ from trezor import protobuf
 from .. import message_handler
 from ..protocol_common import Message
 
-if TYPE_CHECKING:
-    from typing import TypeVar  # pyright: ignore[reportShadowedImports]
-
 CODEC_V1 = 0x3F
 CONTINUATION_PACKET = 0x80
 ENCRYPTED_TRANSPORT = 0x02
@@ -18,8 +14,6 @@ ACK_MESSAGE = 0x20
 _ERROR = 0x41
 _CHANNEL_ALLOCATION_RES = 0x40
 
-LoadedMessageType = TypeVar("LoadedMessageType", bound=protobuf.MessageType)
-
 
 class InitHeader:
     format_str = ">BHH"