ocrad: use generic extract command

The generic code now knows how to extract .tar.lz archives. Remove the local
extract code

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ocrad/ocrad.mk

@@ -10,12 +10,6 @@ OCRAD_SITE = $(BR2_GNU_MIRROR)/ocrad
 OCRAD_LICENSE = GPLv3+
 OCRAD_LICENSE_FILES = COPYING
 OCRAD_INSTALL_STAGING = YES
-OCRAD_DEPENDENCIES = host-lzip
-
-define OCRAD_EXTRACT_CMDS
-	$(HOST_DIR)/usr/bin/lzip -d -c $(DL_DIR)/$(OCRAD_SOURCE) | \
-		tar --strip-components=1 -C $(@D) $(TAR_OPTIONS) -
-endef
 
 # This is not a true autotools package.
 define OCRAD_CONFIGURE_CMDS