MAINTAINERS: remove incorrect M: tag for [email protected]

The [email protected] mailing list should only be listed under the
L: (List) tag in the MAINTAINERS file.  However, it was incorrectly listed
under both L: and M: (Maintainers) tags, which is not accurate.  Remove
the M: tag for [email protected] in the MAINTAINERS file to reflect
the correct categorization.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kuan-Wei Chiu <[email protected]>
Cc: Ching-Chun (Jim) Huang <[email protected]>
Cc: Matthew Sakai <[email protected]>
Cc: Michael Sclafani <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: visitorckw

MAINTAINERS

@@ -6173,7 +6173,6 @@ F:	include/uapi/linux/dm-*.h
 
 DEVICE-MAPPER VDO TARGET
 M:	Matthew Sakai <[email protected]>
-M:	[email protected]
 L:	[email protected]
 S:	Maintained
 F:	Documentation/admin-guide/device-mapper/vdo*.rst