pythonGH-100113: remove remaining yield from usage from asyncio tests (python#100114)

Author: kumaraditya303

Lib/test/test_asyncio/test_tasks.py

@@ -2092,8 +2092,8 @@ def test_cancel_gather_1(self):
  async def create():
  # The indirection fut->child_coro is needed since otherwise the
  # gathering task is done at the same time as the child future
- def child_coro():
- return (yield from fut)
+ async def child_coro():
+ return await fut
  gather_future = asyncio.gather(child_coro())
  return asyncio.ensure_future(gather_future)
  gather_task = loop.run_until_complete(create())