build: drop cameo-factory recipe

The cameo factory images are created using existing image build
commands, which makes the code obsolete.

Signed-off-by: Mathias Kresin <dev@kresin.me>

include/image-commands.mk

@@ -44,18 +44,6 @@ define Build/buffalo-dhp-image
 	mv $@.new $@
 endef
 
-# blow up binary to given size and put a given string at its end:
-# cameo-factory <size[k]> <string>
-define Build/cameo-factory
-	factory_stamp=$(word 2,$(1)); \
-	((reduced_size=$(subst k,*1024,$(word 1,$(1)))-$${#factory_stamp})); \
-	( \
-		dd if=$@ bs=$$reduced_size conv=sync; \
-		echo -n $$factory_stamp; \
-	) > $@.new && \
-	mv $@.new $@
-endef
-
 define Build/eva-image
 	$(STAGING_DIR_HOST)/bin/lzma2eva $(KERNEL_LOADADDR) $(KERNEL_LOADADDR) $@ $@.new
 	mv $@.new $@