drop explicit installation of rsyslog for deb package

dcache-build.yml

@@ -54,5 +54,4 @@ install_deb:
   image: ubuntu:20.04
   script:
     - apt-get update
-    - DEBIAN_FRONTEND=noninteractive apt install -y rsyslog
     - DEBIAN_FRONTEND=noninteractive apt install -y -f ./packages/fhs/target/dcache_*.deb