Fix conda removal

Author: imotov

ci/build_java.sh

@@ -68,7 +68,6 @@ if [[ "$BRANCH" == pull-request/* ]]; then
   rapids-logger "Remove libcuvs from conda environment"
   # Uninstall the conda libcuvs so the JVM's RPATH (which points to the conda
   # env's lib dir) cannot find the old libcuvs_c.so ahead of the PR artifact.
-  # Temporarily allow unbound variables for conda shell hooks.
   set +u
   conda remove --yes --force-remove libcuvs
   set -u