bpo-33958: Doc: Remove unused variable in example (GH-7927)

(cherry picked from commit 62b6cea6b843076cfd6631eccd9347e8c3dd9458)

Co-authored-by: Srinivas Reddy Thatiparthy (శ్రీనివాస్ రెడ్డి తాటిపర్తి) <srinivasreddy@users.noreply.github.com>
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