cli_classic.c: Convert do_erase() to libflashrom call

Inline emergency_help_message() to cli_classic call site.
This leaves do_erase() a redudant wrapper and moves us a step
closer to cli_classic as a pure libflashrom user by using
flashrom_flash_erase().

Tested: `flashrom -E`

Change-Id: I8566164e7dbad69cf478b24208014f10fb99e4d0
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/60068
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Original-Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72287
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/flashrom.c b/flashrom.c
index 17407d5..353a827 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -1496,7 +1496,7 @@
 			 "(see https://www.flashrom.org/Contact for details), thanks!\n");
 }
 
-static void emergency_help_message(void)
+void emergency_help_message(void)
 {
 	msg_gerr("Your flash chip is in an unknown state.\n");
 #if CONFIG_INTERNAL == 1
@@ -2147,23 +2147,6 @@
 	return ret;
 }
 
-int do_erase(struct flashctx *const flash)
-{
-	const int ret = flashrom_flash_erase(flash);
-
-	/*
-	 * FIXME: Do we really want the scary warning if erase failed?
-	 * After all, after erase the chip is either blank or partially
-	 * blank or it has the old contents. A blank chip won't boot,
-	 * so if the user wanted erase and reboots afterwards, the user
-	 * knows very well that booting won't work.
-	 */
-	if (ret)
-		emergency_help_message();
-
-	return ret;
-}
-
 int do_write(struct flashctx *const flash, const char *const filename, const char *const referencefile)
 {
 	const size_t flash_size = flash->chip->total_size * 1024;