MAINTAINERS: powerpc: Remove Aneesh

Aneesh is stepping down from powerpc maintenance.
Acked-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240430044228.49015-1-mpe@ellerman.id.au

MAINTAINERS

@@ -12478,7 +12478,6 @@ LINUX FOR POWERPC (32-BIT AND 64-BIT)
 M:	Michael Ellerman <mpe@ellerman.id.au>
 R:	Nicholas Piggin <npiggin@gmail.com>
 R:	Christophe Leroy <christophe.leroy@csgroup.eu>
-R:	Aneesh Kumar K.V <aneesh.kumar@kernel.org>
 R:	Naveen N. Rao <naveen.n.rao@linux.ibm.com>
 L:	linuxppc-dev@lists.ozlabs.org
 S:	Supported