Remove Emacs hinting from bottom of Markdown files

It's ugly and is not needed.  Users with Emacs should instead tell Emacs
to set the proper mode based on the common .md extension

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

CONTRIBUTING.md

@@ -88,9 +88,3 @@ how `git commit -s` is used to automatically add a `Signed-off-by`:
 [1]:       http://www.gnu.org/philosophy/free-sw.en.html
 [KNF]:     https://en.wikipedia.org/wiki/Kernel_Normal_Form
 [gitbook]: https://git-scm.com/book/ch5-2.html
-
-<!--
-  -- Local Variables:
-  -- mode: markdown
-  -- End:
-  -->

ChangeLog.md

@@ -432,9 +432,3 @@ Initial public release by Carsten Schill.
 [v0.95]:      https://github.com/troglobit/smcroute/compare/0.94.1...0.95
 [v0.94.1]:    https://github.com/troglobit/smcroute/compare/0.94...0.94.1
 [v0.94]:      https://github.com/troglobit/smcroute/compare/0.94.1...0.95
-
-<!--
-  -- Local Variables:
-  -- mode: markdown
-  -- End:
-  -->