[Pkg-raspi-maintainers] Bug#934833: Acknowledgement (raspi3-firmware: Add custom parameter to config.txt)

[basti]

Add raspi-firmware.postrm.

diff --git a/debian/raspi-firmware.postrm b/debian/raspi-firmware.postrm
new file mode 100644
index 0000000..770ebf7
--- /dev/null
+++ b/debian/raspi-firmware.postrm
@@ -0,0 +1,12 @@
+#!/bin/sh
+# vim:ts=2:sw=2:et
+
+set -e
+
+case "$1" in
+  purge)
+         rm -f /etc/default/raspi-firmware-custom
+    ;;
+esac
+
+exit 0