MAINTAINERS.yml: Remove aaillet as Renesas R-Car maintainer

Due to a change in my work situation, I will no longer
have the time to fulfill my obligations as a maintainer.
The Renesas R-Car area will still have a maintainer and
a collaborator, which is enough given the workload involved.

Signed-off-by: Aymeric Aillet <aymeric.aillet@iot.bzh>

Author: aaillet

MAINTAINERS.yml

@@ -4206,7 +4206,6 @@ Release Notes:
 Renesas R-Car Platforms:
   status: maintained
   maintainers:
-    - aaillet
     - lorc
   collaborators:
     - xakep-amatop