Revert "gh-87079: Warn on unintended signal wakeup fd override in `asyncio` (#96807)" (#96898)

This reverts commit 05878106989c6f5b9dd35a6c15a21bee59312827.
Reason: This broke buildbots (some warnings added by that commit are turned to errors in the SSL buildbot).
Repro:  ./python Lib/test/ssltests.py

1 files changed, 2 insertions, 12 deletions

diff --git a/Lib/asyncio/proactor_events.py b/Lib/asyncio/proactor_events.py
index 4808c5d..ddb9dac 100644
--- a/Lib/asyncio/proactor_events.py
+++ b/Lib/asyncio/proactor_events.py
@@ -635,12 +635,7 @@ class BaseProactorEventLoop(base_events.BaseEventLoop):
         self._make_self_pipe()
         if threading.current_thread() is threading.main_thread():
             # wakeup fd can only be installed to a file descriptor from the main thread
-            oldfd = signal.set_wakeup_fd(self._csock.fileno())
-            if oldfd != -1:
-                warnings.warn(
-                    "Signal wakeup fd was already set",
-                    ResourceWarning,
-                    source=self)
+            signal.set_wakeup_fd(self._csock.fileno())
 
     def _make_socket_transport(self, sock, protocol, waiter=None,
                                extra=None, server=None):
@@ -689,12 +684,7 @@ class BaseProactorEventLoop(base_events.BaseEventLoop):
             return
 
         if threading.current_thread() is threading.main_thread():
-            oldfd = signal.set_wakeup_fd(-1)
-            if oldfd != self._csock.fileno():
-                warnings.warn(
-                    "Got unexpected signal wakeup fd",
-                    ResourceWarning,
-                    source=self)
+            signal.set_wakeup_fd(-1)
         # Call these methods before closing the event loop (before calling
         # BaseEventLoop.close), because they can schedule callbacks with
         # call_soon(), which is forbidden when the event loop is closed.