MAINTAINERS: Remove PPP maintainer

I am not currently maintaining the kernel PPP code, so remove my
address from the MAINTAINERS entry for it.

Signed-off-by: Paul Mackerras <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: paulusmack

MAINTAINERS

@@ -16771,9 +16771,8 @@ F:	include/uapi/linux/if_pppol2tp.h
 F:	net/l2tp/l2tp_ppp.c
 
 PPP PROTOCOL DRIVERS AND COMPRESSORS
-M:	Paul Mackerras <[email protected]>
 L:	[email protected]
-S:	Maintained
+S:	Orphan
 F:	drivers/net/ppp/ppp_*
 
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