Remove leftover None prints in test_trade_bad_spend #24402

Job	Run time
Build amd64	15m 55s
Build arm64	16m 33s
Publish amd64	50s
Publish arm64	34s
Test debian:bullseye GUI ARM64	55s
Test debian:bullseye GUI Intel	1m 0s
Test debian:bullseye CLI ARM64	32s
Test debian:bullseye CLI Intel	24s
Test debian:bookworm GUI ARM64	52s
Test debian:bookworm GUI Intel	54s
Test debian:bookworm CLI ARM64	26s
Test debian:bookworm CLI Intel	21s
Test ubuntu:focal (20.04) GUI ARM64	3m 54s
Test ubuntu:focal (20.04) GUI Intel	1m 44s
Test ubuntu:focal (20.04) CLI ARM64	1m 30s
Test ubuntu:focal (20.04) CLI Intel	27s
Test ubuntu:jammy (22.04) GUI ARM64	1m 17s
Test ubuntu:jammy (22.04) GUI Intel	54s
Test ubuntu:jammy (22.04) CLI ARM64	43s
Test ubuntu:jammy (22.04) CLI Intel	24s
	50m 9s

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