Fix some type ignores in backoff and channel

discord/backoff.py

@@ -72,7 +72,7 @@ class ExponentialBackoff(Generic[T]):
         rand = random.Random()
         rand.seed()
 
-        self._randfunc: Callable[..., Union[int, float]] = rand.randrange if integral else rand.uniform  # type: ignore
+        self._randfunc: Callable[..., Union[int, float]] = rand.randrange if integral else rand.uniform
 
     @overload
     def delay(self: ExponentialBackoff[Literal[False]]) -> float:

discord/channel.py

@@ -584,7 +584,7 @@ class TextChannel(discord.abc.Messageable, discord.abc.GuildChannel, Hashable):
         from .webhook import Webhook
 
         if avatar is not None:
-            avatar = utils._bytes_to_base64_data(avatar)  # type: ignore
+            avatar = utils._bytes_to_base64_data(avatar)  # type: ignore - Silence reassignment error
 
         data = await self._state.http.create_webhook(self.id, name=str(name), avatar=avatar, reason=reason)
         return Webhook.from_state(data, state=self._state)