Fix.

commands.py

@@ -202,7 +202,7 @@ async def make_message_shot(bot, message):
   await proc.communicate(input=data)
 
   pproc = await create_subprocess_shell(
-    f'pngcrush -reduce -brute -ow {output_path} {output_path}'
+    f'pngcrush -reduce -ow {output_path} {output_path}'
   )
   await pproc.communicate()