MAINTAINERS: Remove non-working address from MAINTAINERS

The address ariel.dalessandro@collabora.com is no longer working:

  A message that you sent could not be delivered to one or more of its
  recipients. This is a permanent error. The following address(es) failed:

  ariel.dalessandro@collabora.com
    host mx.collabora.co.uk [46.235.227.165]
    SMTP error from remote mail server after RCPT TO:<ariel.dalessandro@collabora.com>:
    550 5.1.1 <ariel.dalessandro@collabora.com>: Recipient address rejected:
    undeliverable address: host mail.collabora.co.uk[46.235.227.172] said:
    550 5.1.1 <ariel.dalessandro@collabora.com>: Recipient address rejected:
    User unknown in local recipient table (in reply to RCPT TO command)

Remove this address from MAINTAINERS.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/board/bsh/imx8mn_smm_s2/MAINTAINERS b/board/bsh/imx8mn_smm_s2/MAINTAINERS
index 1de816c..c789827 100644
--- a/board/bsh/imx8mn_smm_s2/MAINTAINERS
+++ b/board/bsh/imx8mn_smm_s2/MAINTAINERS
@@ -1,5 +1,4 @@
 ARM i.MX8MN BSH SMM S2 BOARDS
-M:	Ariel D'Alessandro <ariel.dalessandro@collabora.com>
 M:	Michael Trimarchi <michael@amarulasolutions.com>
 S:	Maintained
 F:	arch/arm/dts/imx8mn-bsh-smm-s2*
diff --git a/board/variscite/imx8mn_var_som/MAINTAINERS b/board/variscite/imx8mn_var_som/MAINTAINERS
index 367f72d..a0fb154 100644
--- a/board/variscite/imx8mn_var_som/MAINTAINERS
+++ b/board/variscite/imx8mn_var_som/MAINTAINERS
@@ -1,5 +1,4 @@
 ARM i.MX8MN VARISCITE VAR-SOM-MX8MN MODULE
-M:	Ariel D'Alessandro <ariel.dalessandro@collabora.com>
 M:	Hugo Villeneuve <hvilleneuve@dimonoff.com>
 S:	Maintained
 F:	arch/arm/dts/imx8mn-var-som*