Revert "carl9170: Add checksum during installation, as preferred by the driver"

This reverts commit 27bfb9d8

.

There is no need to explicitly add a checksum, as the miniboot tool
normally does this for us.  I can't reproduce the behaviour where the
checksum was omitted.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

carl9170fw/autogen.sh

@@ -31,8 +31,6 @@ case "$1" in
 		   [ "$CONFIG_CARL9170FW_BUILD_MINIBOOT" = "y" ]; then
 			echo -n "Apply miniboot..."
 			tools/src/miniboot a carlfw/carl9170.fw minifw/miniboot.fw
-			echo -n "Add checksum..."
-			tools/src/checksum carlfw/carl9170.fw
 		fi
 
 		install -m 644 carlfw/carl9170.fw \