committing changes in /etc made by "apt-get -y remove modemmanager"

Package changes:

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