flashrom.c: Drop emergency_help_message() after erasure

The emergency help message is only relevent under one
specific sitution:
 i ) The internal programmer was used, &&
 ii) The user was intending not to do a destructive operation.

Since erasing the chip is inherantly a destructive operation
that was requested warning the user they have a unknown state
of spi flash isn't partially (as noted in the FIXME). Therefore
just drop the call and allow `emergency_help_message()` to be
static local.

Change-Id: Ib0d390c44e7a851e684014925a25c8b259b810cd
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
---
M cli_classic.c
M flashrom.c
M include/flash.h
3 files changed, 22 insertions(+), 11 deletions(-)