Merge branch 'master' into trboehre/slackadapter

Author: garypretty

libraries/botbuilder-dialogs/botbuilder/dialogs/choices/channel.py

@@ -32,7 +32,6 @@ def supports_suggested_actions(channel_id: str, button_cnt: int = 100) -> bool:
             # https://dev.kik.com/#/docs/messaging#text-response-object
             Channels.kik: 20,
             Channels.telegram: 100,
-            Channels.slack: 100,
             Channels.emulator: 100,
             Channels.direct_line: 100,
             Channels.webchat: 100,