Revert "ath79: add empty squashfs-lzma filesystem"

This reverts commit 91e3419a33.
Now that squashfs3-lzma generates reproducible output we can drop the
empty binary. Having a binary file in the tree is not nice and we actually
also use squashfs3-lzma for devices which expect the kernel to be loaded
from a squashfs3...

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

include/image-commands.mk

@@ -103,6 +103,16 @@ define Build/append-rootfs
 	dd if=$(IMAGE_ROOTFS) >> $@
 endef
 
+define Build/append-squashfs-fakeroot-be
+	rm -rf $@.fakefs $@.fakesquashfs
+	mkdir $@.fakefs
+	$(STAGING_DIR_HOST)/bin/mksquashfs3-lzma \
+		$@.fakefs $@.fakesquashfs \
+		-noappend -root-owned -be -nopad -b 65536 \
+		$(if $(SOURCE_DATE_EPOCH),-fixed-time $(SOURCE_DATE_EPOCH))
+	cat $@.fakesquashfs >> $@
+endef
+
 define Build/append-squashfs4-fakeroot
 	rm -rf $@.fakefs $@.fakesquashfs
 	mkdir $@.fakefs

target/linux/ath79/image/Makefile

@@ -60,9 +60,6 @@ define Build/relocate-kernel
 	rm -rf $@.relocate
 endef
 
-define Build/append-squashfs-fakeroot-be
-	cat ./empty-squashfs-lzma >> $@
-endef
 
 define Device/Default
   DEVICE_DTS_DIR := ../dts