revert changes to event-loop/thread discussion.

Author: anordin95

Doc/howto/a-conceptual-overview-of-asyncio.rst

@@ -176,11 +176,9 @@ Creating a task automatically schedules it for execution (by adding a
 callback to run it in the event loop's to-do list, that is, collection of jobs).
 The recommended way to create tasks is via :func:`asyncio.create_task`.
 
-:mod:`!asyncio` automatically associates tasks with the event loop for you.
-Typically there's only one event loop, so that's quite straightforward.
-It's uncommon, but some applications use multithreading and :mod:`!asyncio`
-together, where there's one event loop per thread, stored in thread-local
-storage.
+Since there's only one event loop (in each thread), :mod:`!asyncio` takes
+care of associating the task with the event loop for you.
+As such, there's no need to specify the event loop.
 
 ::