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

tests/data/lerobot/pusht_keypoints/meta_data/info.json

@@ -1,3 +1,5 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:cf348d2c6a5cdca1f53f2df3ebce0c88230bf0b40870347f5a871c36b039c4de
-size 65
+{
+    "codebase_version": "v1.6",
+    "fps": 10,
+    "video": 0
+}

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

@@ -1,3 +1,60 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:686d9d9bad8815d67597b997058d9853a04e5bdbe4eed038f4da9806f867af3d
-size 1098
+{
+  "citation": "",
+  "description": "",
+  "features": {
+    "observation.state": {
+      "feature": {
+        "dtype": "float32",
+        "_type": "Value"
+      },
+      "length": 2,
+      "_type": "Sequence"
+    },
+    "observation.environment_state": {
+      "feature": {
+        "dtype": "float32",
+        "_type": "Value"
+      },
+      "length": 16,
+      "_type": "Sequence"
+    },
+    "action": {
+      "feature": {
+        "dtype": "float32",
+        "_type": "Value"
+      },
+      "length": 2,
+      "_type": "Sequence"
+    },
+    "episode_index": {
+      "dtype": "int64",
+      "_type": "Value"
+    },
+    "frame_index": {
+      "dtype": "int64",
+      "_type": "Value"
+    },
+    "timestamp": {
+      "dtype": "float32",
+      "_type": "Value"
+    },
+    "next.reward": {
+      "dtype": "float32",
+      "_type": "Value"
+    },
+    "next.done": {
+      "dtype": "bool",
+      "_type": "Value"
+    },
+    "next.success": {
+      "dtype": "bool",
+      "_type": "Value"
+    },
+    "index": {
+      "dtype": "int64",
+      "_type": "Value"
+    }
+  },
+  "homepage": "",
+  "license": ""
+}

tests/data/lerobot/pusht_keypoints/train/state.json

@@ -1,3 +1,13 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f22ee3500aca1bea0afdda429e841c57a3278dfea92c79bbbf5dac5f984ed648
-size 247
+{
+  "_data_files": [
+    {
+      "filename": "data-00000-of-00001.arrow"
+    }
+  ],
+  "_fingerprint": "a84d00dab0d2d820",
+  "_format_columns": null,
+  "_format_kwargs": {},
+  "_format_type": null,
+  "_output_all_columns": false,
+  "_split": null
+}