History of cleanup 1 change

In .flow/image/build-riscv64.sh, lines 27–30 on riscv-1. 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.