ARM: at91: remove stale MAINTAINER file entries

Going through the entries of recently removed machine types,
I found these two that were removed a long time ago.
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

MAINTAINERS

@@ -1858,16 +1858,6 @@ M:	Lennert Buytenhek <kernel@wantstofly.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 
-ARM/AFEB9260 MACHINE SUPPORT
-M:	Sergey Lapin <slapin@ossfans.org>
-L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-S:	Maintained
-
-ARM/AJECO 1ARM MACHINE SUPPORT
-M:	Lennert Buytenhek <kernel@wantstofly.org>
-L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-S:	Maintained
-
 ARM/Allwinner SoC Clock Support
 M:	Emilio López <emilio@elopez.com.ar>
 S:	Maintained