ci/deqp-runner: Drop unused "count" variable

Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6392>

.gitlab-ci/deqp-runner.sh

@@ -301,8 +301,6 @@ if [ $DEQP_EXITCODE -ne 0 ]; then
         echo "Unexpected results found:"
         cat $UNEXPECTED_RESULTSFILE
     fi
-
-    count=`cat $UNEXPECTED_RESULTSFILE | wc -l`
 else
     grep ",Flake" $RESULTSFILE > $FLAKESFILE