flashrom.c: Fix up stale FIXME comment when doit() was removed

Once upon a time flashrom had a entry point function called
doit(). Excise the last mention of it here so that we may
never mention it again.

BUG=none
TEST=none

Change-Id: I40d815b7154456c323b4230cd3fed2cc2e8e3641
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/52365
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/flashrom.c b/flashrom.c
index c89abad..056fc57 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -2189,8 +2189,8 @@
 	return ret;
 }
 
-/* FIXME: This function signature needs to be improved once doit() has a better
- * function signature.
+/* FIXME: This function signature needs to be improved once prepare_flash_access()
+ * has a better function signature.
  */
 static int chip_safety_check(const struct flashctx *flash, int force,
 			     int read_it, int write_it, int erase_it, int verify_it)