History of cleanup 1 change

In .flow/image/build-riscv64.sh, lines 27–30 on 712ea2b4d3463dfffafa6ec39721181afc825a9f5fcee0f9d6532678e3147ebe. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 27,30:.flow/image/build-riscv64.sh.