MAINTAINERS: Remove dead path from LOCKING PRIMITIVES entry

Since 890658b ("locking/mutex: Kill arch specific code"), there
are no mutex header files under arch/, so we can remove the redundant
entry from MAINTAINERS.

Reported-by: Joe Perches <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
Cc: Jason Low <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

MAINTAINERS

@@ -8598,7 +8598,6 @@ F:	include/linux/spinlock*.h
 F:	arch/*/include/asm/spinlock*.h
 F:	include/linux/rwlock*.h
 F:	include/linux/mutex*.h
-F:	arch/*/include/asm/mutex*.h
 F:	include/linux/rwsem*.h
 F:	arch/*/include/asm/rwsem.h
 F:	include/linux/seqlock.h