.travis.yml: remove IRC notifications

Since we're using Slack now, there's no need to send
notifications to the #spdk IRC channel.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ie484bbeac2d8a959da8371d54e0d74f2cb4ae1d3

Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/456893
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

.travis.yml

@@ -25,14 +25,3 @@ script:
   - ./configure --enable-werror
   - make
   - ./test/unit/unittest.sh
-
-notifications:
-  if: repository_slug = spdk/spdk
-  irc:
-    channels:
-      - "chat.freenode.net#spdk"
-    template:
-      - "(%{repository_name}/%{branch}) %{commit_subject} (%{author})"
-      - "Diff URL: %{compare_url}"
-    on_success: always
-    on_failure: always