ci: Move CI container kill out of 06_script_b.sh

This cleans up 06_script_b.sh to only contain code to be executed inside
the CI pod, which avoids confusion and is needed for the next commit.

ci/test/06_script_b.sh

@@ -99,8 +99,3 @@ fi
 if [ "$RUN_FUZZ_TESTS" = "true" ]; then
   CI_EXEC LD_LIBRARY_PATH="${DEPENDS_DIR}/${HOST}/lib" test/fuzz/test_runner.py "${FUZZ_TESTS_CONFIG}" "$MAKEJOBS" -l DEBUG "${DIR_FUZZ_IN}"
 fi
-
-if [ -z "$DANGER_RUN_CI_ON_HOST" ]; then
-  echo "Stop and remove CI container by ID"
-  docker container kill "${CI_CONTAINER_ID}"
-fi