Drop LIC_FILES_CHKSUM from swupdate-image

This is not required for the image and generates
incompatibility among Yocto's releases.

Signed-off-by: Stefano Babic <sbabic@denx.de>
Reported-by: Çağlar Kilimci <ckilimci@gmail.com>

recipes-extended/images/swupdate-image.bb

@@ -16,10 +16,6 @@ IMAGE_INSTALL = "base-files \
 
 USE_DEVFS = "1"
 
-LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58 \
-                    file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420 \
-		   "
-
 # This variable is triggered to check if sysvinit must be overwritten by a single rcS
 export SYSVINIT = "no"