deps: remove old c-ares configure files

Remove leftover files that were added in commit 58e4eda from 2013
to help with standalone builds of the c-ares fork that we maintained
at the time.

PR-URL: #23854
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: bnoordhuis

deps/cares/Makefile

@@ -35,7 +35,6 @@
         'include_dirs': [ 'include' ]
       },
       'sources': [
-        'common.gypi',
         'include/ares.h',
         'include/ares_rules.h',
         'include/ares_version.h',