Motion Sample: drop the LeRobot dataset variant

The published dataset is PHC pickle only, so the viewer's footer no longer mentions
LeRobot and the frame count matches the trimmed highjump (2759 total).

motionSample/index.html

@@ -93,7 +93,7 @@
     <span class="stat" id="stat"></span>
   </div>
   <div class="row" id="dl">
-    <span class="hint">Dataset &mdash; PHC-style pickle &middot; 2 files &middot; 6563 frames &middot; 120 Hz &middot; 31 DoF &middot; <b>kinematic reference, not dynamically validated</b></span>
+    <span class="hint">Dataset &mdash; PHC-style pickle &middot; 2 files &middot; 2759 frames &middot; 120 Hz &middot; 31 DoF &middot; <b>kinematic reference, not dynamically validated</b></span>
   </div>
 </div>
 <div id="err"></div>
@@ -105,7 +105,7 @@
 // 注意: <div id="load"> 会在 window 上建一个同名全局, 所以这个 helper 必须真的定义,
 // 否则 load(...) 拿到的是那个 DOM 元素, 报 "load is not a function"。
 const load=m=>{const e=document.getElementById('load');if(e)e.textContent=m};
-// 数据下载。指向 HF 上的 motionSample 数据集。
+// 数据下载, 指向 HF 上的 motionSample 数据集。
 const DL_BASE='https://huggingface.co/datasets/faradayfuture/motionSample/resolve/main/';
 const DL_REPO='https://huggingface.co/datasets/faradayfuture/motionSample';
 for(const[label,href]of[