Delete TorchBench from NavBar (#6587)

Because whatever ranges to select it crashes
But if one wants to experience crashes, page is still accessible via
https://hud.pytorch.org/torchbench/userbenchmark

Fixes #6567 thru
out-of-sight-out-of-mind incantation

Author: malfet

torchci/components/NavBar.tsx

@@ -45,10 +45,6 @@ function NavBar() {
       name: "TorchAO",
       href: "/benchmark/torchao",
     },
-    {
-      name: "TorchBench",
-      href: "/torchbench/userbenchmark",
-    },
     {
       name: "Triton",
       href: "/tritonbench/commit_view",