remove reference to Makefile.example from the other repo

next/guidelines.html

@@ -1038,8 +1038,7 @@ that’s OK too!
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 We <strong>recommend</strong> AND <strong>encourage</strong> you to use the example Makefile <strong>here</strong>,
-rather than the <code>mkiocccentry</code> repo’s <code>Makefile.example</code>, renamed as <code>Makefile</code>
-of course, as the starting point for your submission’s required <code>Makefile</code>:
+as the starting point for your submission’s required <code>Makefile</code>:
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