Undo changes in .travis.yml

.travis.yml

@@ -9,7 +9,7 @@ before_install:
   - echo 'deb http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main' | sudo tee /etc/apt/sources.list.d/pgdg.list
   - curl https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
   - sudo apt-get update
-  - sudo apt-get install -y postgresql-11 postgis-2.5 liblwgeom-dev libpq-dev libpqtypes-dev postgresql-server-dev-11 libproj-dev postgresql-11-postgis-2.5 postgresql-11-postgis-2.5-scripts libjson-c-dev
+  - sudo apt-get install -y postgresql-11 postgis liblwgeom-dev libpq-dev libpqtypes-dev postgresql-server-dev-11 libproj-dev postgresql-11-postgis-2.5 postgresql-11-postgis-2.5-scripts libjson-c-dev
   - pip install --user cpp-coveralls
 
 before_script: