CI: Drop shm hack. Probably Travis-related?

Author: effigies

tools/ci/install_deb_dependencies.sh

@@ -7,8 +7,6 @@ set -eu
 echo "INSTALL_DEB_DEPENDENCIES = $INSTALL_DEB_DEPENDENCIES"
 
 if $INSTALL_DEB_DEPENDENCIES; then
-    sudo rm -rf /dev/shm
-    sudo ln -s /run/shm /dev/shm
     bash <(wget -q -O- http://neuro.debian.net/_files/neurodebian-travis.sh)
     sudo apt update
     sudo apt install -y -qq fsl afni elastix fsl-atlases xvfb fusefat graphviz