Chromeos: Remove Kconfig workaround for VIRTUAL_DEV_SWITCH warnings

With VIRTUAL_DEV_SWITCH moved under 'config CHROMEOS' in all of the
mainboards, this is no longer needed.

Change-Id: I5fbea17969f6b0c3b8a5dcd519ab9d36eb2ad6f1
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: http://review.coreboot.org/11337
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/vendorcode/google/chromeos/Kconfig b/src/vendorcode/google/chromeos/Kconfig
index 2f04f24..8309d19 100644
--- a/src/vendorcode/google/chromeos/Kconfig
+++ b/src/vendorcode/google/chromeos/Kconfig
@@ -166,12 +166,4 @@
 source src/vendorcode/google/chromeos/vboot2/Kconfig
 
 endif # CHROMEOS
-if !CHROMEOS
-config VIRTUAL_DEV_SWITCH
-	bool
-	default n
-	depends on MAINBOARD_HAS_CHROMEOS
-	help
-	  Whether this platform has a virtual developer switch.
-endif
 endmenu