Update .travis.yml

Author: SergeyPirogov

.travis.yml

@@ -8,8 +8,6 @@ python:
   - "2.7"
 
 before_install:
-  - sudo apt-get update -qq
-  - sudo apt-get -y -o Dpkg::Options::=--force-confdef -o Dpkg::Options::=--force-confnew install docker-engine
   - export CHROME_BIN=/usr/bin/google-chrome
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
@@ -37,4 +35,4 @@ script:
 notifications:
   email:
     recipients:
-      - [email protected]
+      - [email protected]