Make sure calamares is removed post install

debian/calamares.install

@@ -1,3 +1,4 @@
 usr/*
 debian/settings.conf /etc/calamares/
 debian/unpackfs.conf /etc/calamares/modules/
+debian/packages.conf /etc/calamares/modules/

debian/packages.conf

@@ -0,0 +1,5 @@
+backend: apt
+
+operations:
+  - remove:
+      - calamares