pan/bi: Remove comment about old scheduler design

I've realized it really has to be 1-pass to be sane.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5260>
diff --git a/src/panfrost/bifrost/compiler.h b/src/panfrost/bifrost/compiler.h
index eb0c4d1..ed3c357 100644
--- a/src/panfrost/bifrost/compiler.h
+++ b/src/panfrost/bifrost/compiler.h
@@ -301,11 +301,7 @@
         };
 } bi_instruction;
 
-/* Scheduling takes place in two steps. Step 1 groups instructions within a
- * block into distinct clauses (bi_clause). Step 2 schedules instructions
- * within a clause into FMA/ADD pairs (bi_bundle).
- *
- * A bi_bundle contains two paired instruction pointers. If a slot is unfilled,
+/* A bi_bundle contains two paired instruction pointers. If a slot is unfilled,
  * leave it NULL; the emitter will fill in a nop.
  */