fix delete

hail/python/hailtop/aiotools/delete.py

@@ -18,8 +18,15 @@ async def delete(paths: Iterator[str]) -> None:
             async with sema:
                 with SimpleCopyToolProgressBar(description='files', transient=True, total=0) as file_pbar:
                     listener = file_pbar.make_listener()
+
+                    async def remove(path):
+                        try:
+                            await fs.remove(path)
+                        except FileNotFoundError:
+                            await fs.rmtree(sema, path, listener=listener)
+
                     for grouped_paths in grouped(5_000, paths):
-                        await asyncio.gather(*[fs.rmtree(sema, path, listener=listener) for path in grouped_paths])
+                        await asyncio.gather(*[remove(path) for path in grouped_paths])
 
 
 async def main() -> None: