Remove duplicate paragraph.

wiki/src/contribute/how/debian.mdwn

@@ -52,11 +52,6 @@ relationship with Debian.
   development branches, and/or change the workflow of this project so
   that one can backport improvements into the stable branches.
 
-# Want more?
-
-You might want to subscribe to the [tails-dev mailing
-list](https://mailman.boum.org/listinfo/tails-dev).
-
 # Talk to us
 
 [[!inline pages="contribute/talk" raw="yes"]]