Temporarily remove .travis.yml to stop testing this branch

The builds hang and eventually fail. Better not to waste Travis's
time until we get the tests running here.

.travis.yml

@@ -1,16 +0,0 @@
-language: cpp
-compiler:
-    - gcc
-env:
-    matrix:
-        - FIREFOXVERSION="36.0.1"
-        - FIREFOXVERSION="31.5.0esr"
-notifications:
-    email: false
-before_install:
-    - export DISPLAY=:99.0
-    - sh -e /etc/init.d/xvfb start
-    - wget http://ftp.mozilla.org/pub/firefox/releases/${FIREFOXVERSION}/linux-x86_64/en-US/firefox-${FIREFOXVERSION}.tar.bz2
-    - tar -xjf firefox-${FIREFOXVERSION}.tar.bz2
-script:
-    - test/runtests.sh -x firefox/firefox