Revert "ANDROID: fs: epoll: use freezable blocking call"

It causes big merge issues with a 5.11-rc1 merge point, so revert this
patch for now, hopefully we can add it back at a later point...

Bug: 77139736
Bug: 120440023
Cc: Colin Cross <ccross@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I4915482c510a7c7b19db60161a031b70ec75d66c