sh64: Kill off duplicate frame pointer option.

This is already enabled through lib/Kconfig.debug, kill off the
architecture specific one.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh64/Kconfig.debug

@@ -32,13 +32,4 @@ config SH_ALPHANUMERIC
 config SH_NO_BSS_INIT
 	bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)"
 
-config FRAME_POINTER
-	bool "Compile the kernel with frame pointers"
-	default y if KGDB
-	help
-	  If you say Y here the resulting kernel image will be slightly larger
-	  and slower, but it will give very useful debugging information.
-	  If you don't debug the kernel, you can say N, but we may not be able
-	  to solve problems without frame pointers.
-
 endmenu