rugnux_vs_xds.py: drop the removed --scaling-output flag

rugnux always writes both MTZ and CIF now (the --scaling-output option was
removed), so passing it made every crystal in the battery fail against the
current binary.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

rugnux_vs_xds.py

@@ -185,7 +185,8 @@ def run_rugnux(master, workdir, name, xds, rugnux_bin, threads, timeout, reuse):
     if reuse and cif.exists():
         return cif, None, None   # no fresh timing when we skip the run
 
-    cmd = [rugnux_bin, "-o", name, "--scaling-output", "cif"]
+    # rugnux always writes both MTZ and CIF now (the old --scaling-output flag was removed).
+    cmd = [rugnux_bin, "-o", name]
     if xds.get("anomalous"):
         cmd.append("-A")
     if xds.get("dmin"):