iomap: drop me [hch] from MAINTAINERS for iomap

As Darrick prefers to micro-manage this without looking at my input
for code I wrote and then complain about getting burned out by that
I might as well drop myself from the maintainers file.

[djwong: and I don't like it when you all bikeshed a single-patch
submission to the point that new bugs are being introduced in the scope
creep that wasn't part of V1-V7!]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

Author: Christoph Hellwig

MAINTAINERS

@@ -10813,7 +10813,6 @@ S:	Maintained
 F:	drivers/net/ethernet/sgi/ioc3-eth.c
 
 IOMAP FILESYSTEM LIBRARY
-M:	Christoph Hellwig <hch@infradead.org>
 M:	Darrick J. Wong <djwong@kernel.org>
 L:	linux-xfs@vger.kernel.org
 L:	linux-fsdevel@vger.kernel.org