Move rust rules to their own repository

CONTRIBUTORS

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
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index 0000000..7f8ed2b
--- /dev/null
+++ b/CONTRIBUTORS
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+# People who have agreed to one of the CLAs and can contribute patches.
+# The AUTHORS file lists the copyright holders; this file
+# lists people.  For example, Google employees are listed here
+# but not in AUTHORS, because Google holds the copyright.
+#
+# https://developers.google.com/open-source/cla/individual
+# https://developers.google.com/open-source/cla/corporate
+#
+# Names should be added to this file as:
+#     Name <email address>
+
+Damien Martin-Guillerez <dmarting@google.com>
+David Chen <dzc@google.com>
+Florian Weikert <fwe@google.com>
+Francois-Rene Rideau <tunes@google.com>
+Julio Merino <jmmv@google.com>
+Kamal Marhubi <kamal@marhubi.com>
+Kristina Chodorow <kchodorow@google.com>
+Philipp Wollermann <philwo@google.com>
+Ulf Adams <ulfjack@google.com>