serial: Remove obsolete CONS_INDEX_n Kconfig options

These were only ever implied by sunxi platforms, and that usage has
been removed. Current practice is to specify CONFIG_CONS_INDEX in each
board's defconfig.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index f6425a5..45c284a 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -84,36 +84,10 @@
 	  This option enables the full UART in TPL, so if is it disabled,
 	  the full UART driver will be omitted, thus saving space.
 
-# Logic to allow us to use the imply keyword to set what the default port
-# should be.  The default is otherwise 1.
-config CONS_INDEX_0
-	bool
-
-config CONS_INDEX_2
-	bool
-
-config CONS_INDEX_3
-	bool
-
-config CONS_INDEX_4
-	bool
-
-config CONS_INDEX_5
-	bool
-
-config CONS_INDEX_6
-	bool
-
 config CONS_INDEX
 	int "UART used for console"
 	depends on SPECIFY_CONSOLE_INDEX
 	range 0 6
-	default 0 if CONS_INDEX_0
-	default 2 if CONS_INDEX_2
-	default 3 if CONS_INDEX_3
-	default 4 if CONS_INDEX_4
-	default 5 if CONS_INDEX_5
-	default 6 if CONS_INDEX_6
 	default 1
 	help
 	  Set this to match the UART number of the serial console.