cmd/api: remove debug print
cmd/api: remove debug print

Left over from CL 392414.

Change-Id: I32ff1d660ba03d6c2005ad247e2129daf83aac04
Reviewed-on: https://go-review.googlesource.com/c/go/+/393361
Trust: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
Run-TryBot: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>

CAFxX/go,nawawi/go,golang/go,nawawi/go,CAFxX/go,nawawi/go,golang/go,CAFxX/go,nawawi/go,nawawi/go,CAFxX/go,golang/go,nawawi/go,nawawi/go,golang/go,nawawi/go,CAFxX/go,golang/go,golang/go,CAFxX/go,golang/go,CAFxX/go,golang/go,CAFxX/go