ci: Do not take cross-build into consideration for kata-arch.sh

Right now we'd need to import lib.sh just in order to get cross-build
information for rust, and it seems a little bit premature to do so at
this stage and only for rust.

Let's skip it and keep this transition simple.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tests/kata-arch.sh

@@ -10,7 +10,6 @@ set -e
 typeset -r script_name=${0##*/}
 
 typeset -r cidir=$(dirname "$0")
-source "${cidir}/lib.sh"
 
 function usage() {
 	cat <<EOF
@@ -48,10 +47,9 @@ function arch_to_rust() {
 
 	if [ "${arch}" == "ppc64le" ]; then
 		arch="powerpc64le"
-		ARCH="${arch}"
 	fi
 
-	[ "${CROSS_BUILD}" == "false" ] && echo "${arch}" || echo "${ARCH}"
+	echo "${arch}"
 }
 
 # Convert architecture to the name used by the Linux kernel build system