remove unused .travis.yml file

services/track-changes/.travis.yml

@@ -1,18 +0,0 @@
-language: node_js
-
-before_install:
-    - npm install -g grunt-cli
-
-install:
-    - npm install
-    - grunt install
-
-before_script:
-    - grunt forever:app:start
-
-script:
-    - grunt test:unit
-
-services:
-    - redis-server
-    - mongodb