Fix docs about nc model info

Author: FlorentinD

doc/asciidoc/machine-learning/node-property-prediction/nodeclassification-pipeline/training.adoc

@@ -142,15 +142,7 @@ The structure of `modelInfo` is:
                 max: Float,
                 min: Float,
                 params: Map
-            },
-            {
-                avg: Float,
-                max: Float,
-                min: Float,
-                params: Map
-            },
-            ...
-            ]
+            }
         }
     }
 }