remove unused .travis.yml file

services/real-time/.travis.yml

@@ -1,12 +0,0 @@
-language: node_js
-
-before_install:
-    - npm install -g grunt-cli
-
-install:
-    - npm install
-    - grunt install
-
-script:
-    - grunt test:unit
-    - grunt compile:acceptance_tests