remove unused properties from cpp2 generator
remove unused properties from cpp2 generator

Summary:
function s () { if [ "$(fbgs $1 -f thrift/compiler/generate/ | wc -l)" == "1" ]; then echo $1; fi; }
export -f s
parallel -a /tmp/scraped_annotations s

Reviewed By: vitaut

Differential Revision: D20069523

fbshipit-source-id: c94fa28687fd6d02a1c8a296dbfbc6e7538a5c42

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