remove unused .travis.yml file

services/chat/.travis.yml

@@ -1,14 +0,0 @@
-language: node_js
-
-node_js:
-    - "0.10"
-
-before_install:
-    - npm install -g grunt-cli
-
-install:
-    - npm install
-    - grunt install
-
-script:
-    - grunt test:unit