Fix nightlies & untrack json files from git lfs (#414)

tests/data/lerobot/unitreeh1_warehouse/train/dataset_info.json

@@ -1,3 +1,50 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:3decb709c24854fa7d18d790bb6f7ed9eabd3cadedbcd775d8c7ea805231a44b
-size 920
+{
+  "citation": "",
+  "description": "",
+  "features": {
+    "observation.images.cam_left": {
+      "_type": "VideoFrame"
+    },
+    "observation.images.cam_right": {
+      "_type": "VideoFrame"
+    },
+    "observation.state": {
+      "feature": {
+        "dtype": "float32",
+        "_type": "Value"
+      },
+      "length": 19,
+      "_type": "Sequence"
+    },
+    "action": {
+      "feature": {
+        "dtype": "float32",
+        "_type": "Value"
+      },
+      "length": 40,
+      "_type": "Sequence"
+    },
+    "episode_index": {
+      "dtype": "int64",
+      "_type": "Value"
+    },
+    "frame_index": {
+      "dtype": "int64",
+      "_type": "Value"
+    },
+    "timestamp": {
+      "dtype": "float32",
+      "_type": "Value"
+    },
+    "next.done": {
+      "dtype": "bool",
+      "_type": "Value"
+    },
+    "index": {
+      "dtype": "int64",
+      "_type": "Value"
+    }
+  },
+  "homepage": "",
+  "license": ""
+}