docs(forward_context): update stale virtual_engine comment for vLLM 0.22

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: 2 people

vllm_rbln/forward_context.py

@@ -221,9 +221,7 @@ def _set_forward_context(
             num_padded_tokens,
         )
 
-    # NOTE: We intentionally omit `virtual_engine`. It defaults to 0 on
-    # vLLM 0.18 and is removed in 0.19+, so passing it would either be
-    # a no-op or a TypeError depending on the installed version.
+    # NOTE: vLLM v0.22 removed the virtual_engine parameter
     forward_context = create_forward_context(
         attn_metadata,
         vllm_config,