cputest: Fix name of the file removed by cpu-parse.sh

We want to remove the file created by

    json <<<"$data" >$fname.json

in case it was empty.
Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

tests/cputestdata/cpu-parse.sh

@@ -53,5 +53,5 @@ json <<<"$data" >$fname.json
 if [[ -s $fname.json ]]; then
     echo $fname.json
 else
-    rm $fname.new.json
+    rm $fname.json
 fi