MAINTAINERS: remove file
MAINTAINERS: remove file

The MAINTAINERS file is deprecated in favor of OWNERS.

Signed-off-by: Patrick Williams <cbb7353e6d953ef360baf960c122346276c6e320@stwcx.xyz>
Change-Id: I24e085dcce11a62d70d1dc943c7cf6bcd774a3a2

openbmc/phosphor-ipmi-flash