Drop GitPitch stuff, they're shutting down on March 1st 2021

Author: xtaran

PITCHME.md

@@ -14,8 +14,7 @@ The `orig.tar.gz` file must only contain the `dist.ini` and source
 files but not the generated files like `META.yml`, `README`, etc.
 
 See [dh-dist-zilla.pod](dh-dist-zilla.pod) for details on how to use
-it or have a look at dh-dist-zilla's
-[GitPitch slideshow](https://gitpitch.com/elmar/dh-dist-zilla).
+it.
 
 Background
 ----------

README.markdown

@@ -1,3 +1,10 @@
+dh-dist-zilla (1.4.2) UNRELEASED; urgency=medium
+
+  * Remove slideshow source code for and references to the no more working
+    GitPitch service.
+
+ -- Axel Beckert <abe@debian.org>  Tue, 16 Feb 2021 19:09:10 +0100
+
 dh-dist-zilla (1.4.1) unstable; urgency=medium
 
   * Use the Debian Perl Team's autopkgtest helpers.