Remove more unused file.
diff --git a/contiki-cpc/arch/crt0-backup.s b/contiki-cpc/arch/crt0-backup.s
deleted file mode 100644
index b014aa8..0000000
--- a/contiki-cpc/arch/crt0-backup.s
+++ /dev/null
@@ -1,33 +0,0 @@
-;; File: crt0.s
-;; Generic crt0.s for a Z80
-;; From SDCC..
-;; Modified to suit execution on the Amstrad CPC!
-;; by H. Hansen 2003
-
- .module crt0
- .globl _main
- .globl _progend
- .area _HEADER (ABS)
- .org 0x100 ;; Start from address &100
-init:
-
-;; Initialise global variables
- call gsinit
- call _main
-
-_exit::
- ret
-
- ;; Ordering of segments for the linker.
- .area _HOME
- .area _CODE
- .area _DATA
- .area _BSS
-
- .area _GSINIT
-gsinit::
-
- .area _GSFINAL
- ret
- .area _HEAP
-_progend::