Merge pull request #4550 from cpinitiative/kattis-cordonbleu-metadata

fix sol metadata for kattis-cordonbleu

Author: bqi343

content/6_Advanced/MinCostFlow.problems.json

@@ -116,7 +116,7 @@
       "isStarred": false,
       "tags": [],
       "solutionMetadata": {
-        "kind": "internal"
+        "kind": "none"
       }
     }
   ]