arch/x86/Kconfig: Remove unused NUM_IPI_STARTS

Change-Id: I3b781c42ef6c23a5dcd31215c14fb9d7104822f2
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72144
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig
index 1f5a37f..8d2295b 100644
--- a/src/arch/x86/Kconfig
+++ b/src/arch/x86/Kconfig
@@ -135,15 +135,6 @@
 	depends on !X86_CUSTOM_BOOTMEDIA
 	default y
 
-# This is something you almost certainly don't want to mess with.
-# How many SIPIs do we send when starting up APs and cores?
-# The answer in 2000 or so was '2'. Nowadays, on many systems,
-# it is 1. Set a safe default here, and you can override it
-# on reasonable platforms.
-config NUM_IPI_STARTS
-	int
-	default 2
-
 config PRERAM_CBMEM_CONSOLE_SIZE
 	hex
 	default 0xc00