MAINTAINERS: Remove myself as a Arm CoreSight reviewer

I haven't done any meaningful work for a long while on Arm CoreSight and
it's unlikely I'll be able to do related work in the future.

Remove myself from the Arm CoreSight "Reviewers" list.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230904092311.389112-1-leo.yan@linaro.org

MAINTAINERS

@@ -2063,7 +2063,6 @@ ARM/CORESIGHT FRAMEWORK AND DRIVERS
 M:	Suzuki K Poulose <suzuki.poulose@arm.com>
 R:	Mike Leach <mike.leach@linaro.org>
 R:	James Clark <james.clark@arm.com>
-R:	Leo Yan <leo.yan@linaro.org>
 L:	coresight@lists.linaro.org (moderated for non-subscribers)
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained