committing changes in /etc made by "apt autoremove"

Package changes:
-jsvc 1.0.15-8 amd64
-libbelcard1 1.0.2-1 amd64
-libbelr1 0.1.3-2 amd64
-libcommons-daemon-java 1.0.15-8 all
-libgoogle-perftools4 2.5-2.2ubuntu3 amd64
-liblinphone9 3.12.0-3 amd64
-libmediastreamer-base10 1:2.16.1-4build1 amd64
-libmediastreamer-voip10 1:2.16.1-4build1 amd64
-libortp13 1:1.0.2-1 amd64
-libpcrecpp0v5 2:8.39-12 amd64
-libtcmalloc-minimal4 2.5-2.2ubuntu3 amd64
-mongo-tools 3.6.3-0ubuntu1 amd64
-mongodb-clients 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu2 amd64
-mongodb-server-core 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu2 amd64

diff --git a/systemd/system/mongodb.service b/systemd/system/mongodb.service
new file mode 120000 (symlink)
index 0000000..dc1dc0c
--- /dev/null
+++ b/systemd/system/mongodb.service
@@ -0,0 +1 @@
+/dev/null
\ No newline at end of file