Disable grass7 tests

Packages are unavailable (at the moment?)

ci/travis/linux/before_install.sh

@@ -5,7 +5,6 @@ sudo add-apt-repository 'deb http://llvm.org/apt/precise/ llvm-toolchain-precise
 
 sudo add-apt-repository ppa:ubuntugis/ppa -y
 sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable -y # For postgresql-9.1-postgis-2.1
-sudo add-apt-repository ppa:grass/grass-stable -y
 sudo add-apt-repository ppa:smspillaz/cmake-3.0.2 -y
 sudo add-apt-repository ppa:kedazo/doxygen-updates-precise -y # For doxygen 1.8.8
 sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
@@ -19,7 +18,6 @@ sudo apt-get install --force-yes --no-install-recommends --no-install-suggests \
         git \
         graphviz \
         grass-dev \
-        grass7-dev \
         libexpat1-dev \
         libfcgi-dev \
         libgdal1-dev \

ci/travis/linux/install.sh

@@ -5,7 +5,6 @@ export CC="clang-3.7"
 cmake -DWITH_SERVER=ON \
       -DWITH_STAGED_PLUGINS=OFF \
       -DWITH_GRASS=ON \
-      -DWITH_GRASS7=ON \
       -DSUPPRESS_QT_WARNINGS=ON \
       -DENABLE_MODELTEST=ON \
       -DENABLE_PGTEST=ON \