Remove aioeventlet executor

I wrote the aioeventlet executor as a first step to replace eventlet
with trollius in OpenStack. Sadly, the project of replacing eventlet
with something else (trollius, threads or whatever) looks to be stuck
because of various reasons. See the spec:

    "Replace eventlet + monkey-patching with ??"
    https://review.openstack.org/#/c/164035/

Recently, I deprecated the trollius project in favor of asyncio:

    http://trollius.readthedocs.org/deprecated.html

Since I abandonned my project to replace eventlet with trollius, I
now propose to remove the unused aioeventlet executor from Oslo
Messaging to simplify the code and remove unused dependencies
(especially trollius).

Since the aioeventlet executor is not used by any application, it's
safe to remove it. Removing the executor removes trollius and
aioeventlet dependencies.

... The executor may come back "later" when the first OpenStack
service will start to drop Python 2 support.

For more information on asyncio in OpenStack, see:
http://aioeventlet.readthedocs.org/openstack.html

Note: the executor was added by the change
I7a78ed998719a703077232726f66d882463b1297.

Change-Id: I10d8d7d4134b32e4fc0badfa15e9ffb005910139

1 files changed, 0 insertions, 4 deletions

diff --git a/requirements.txt b/requirements.txt
index c09392b..ef900b8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,3 @@ retrying!=1.3.0,>=1.2.3 # Apache-2.0
 
 # middleware
 oslo.middleware>=3.0.0 # Apache-2.0
-
-# needed by the aioeventlet executor
-aioeventlet>=0.4 # Apache-2.0
-trollius>=1.0 # Apache-2.0