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etm4_remove_dev() returned zero unconditionally. Make it return void instead, which makes it clear in the callers that there is no error to handle. Simplify etm4_remove_platform_dev() accordingly. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20230518201629.260672-1-u.kleine-koenig@pengutronix.de