remove Vim and Emacs variable settings from C source files

Done with these commands:
git grep -l Local.variab|xargs \
  perl -0x3b -pi -e 's,\n+/\*\n \* vim:(.|\n)*,\n,'

git grep -l Local.variab|xargs \
  perl -0x3b -pi -e 's,\n+/\*\n \* Local variables:\n(.|\n)*,\n,'

proxy/libvirt_proxy.c

@@ -846,17 +846,3 @@ int main(void) {
 }
 
 #endif /* WITH_XEN */
-
-/*
- * vim: set tabstop=4:
- * vim: set shiftwidth=4:
- * vim: set expandtab:
- */
-/*
- * Local variables:
- *  indent-tabs-mode: nil
- *  c-indent-level: 4
- *  c-basic-offset: 4
- *  tab-width: 4
- * End:
- */