soc/amd/picasso: remove unused AMDFW_OUTSIDE_CBFS Kconfig option

The corresponding functionality in the SoC's Makefile.inc was removed in
commit ef3395d990bbf1118a8d4e367a986bdbc92b1820

Change-Id: Iba84d9deb155ce314b3a3588781752b83a21486b
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47890
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig
index 6fa3664..c3995c8 100644
--- a/src/soc/amd/picasso/Kconfig
+++ b/src/soc/amd/picasso/Kconfig
@@ -406,14 +406,6 @@
 
 menu "PSP Configuration Options"
 
-config AMDFW_OUTSIDE_CBFS
-	bool
-	default n
-	help
-	  The AMDFW (PSP) is typically locatable in cbfs.  Select this
-	  option to manually attach the generated amdfw.rom outside of
-	  cbfs.  The location is selected by the FWM position.
-
 config AMD_FWM_POSITION_INDEX
 	int "Firmware Directory Table location (0 to 5)"
 	range 0 5