Remove train_test_split in config example

Author: Alexsandruss

config_example.json

@@ -176,42 +176,6 @@
             "max-cache-size": [4],
             "kernel": ["rbf"]
         },
-        {
-            "lib": ["sklearn"],
-            "algorithm": "train_test_split",
-            "dataset": [
-                {
-                    "source": "synthetic",
-                    "type": "classification",
-                    "n_classes": 2,
-                    "n_features": 20,
-                    "training": {
-                        "n_samples": 500000
-                    }
-                },
-                {
-                    "source": "synthetic",
-                    "type": "classification",
-                    "n_classes": 2,
-                    "n_features": 100,
-                    "training": {
-                        "n_samples": 100000
-                    }
-                },
-                {
-                    "source": "synthetic",
-                    "type": "classification",
-                    "n_classes": 2,
-                    "n_features": 5000,
-                    "training": {
-                        "n_samples": 5000
-                    }
-                }
-            ],
-            "include-y": [""],
-            "train-size": [0.75],
-            "test-size": [0.25]
-        },
         {
             "lib": ["xgboost"],
             "algorithm": "gbt",