chore: remove benchmark comment, trigger Docker rebuild + warm cache

Removes temporary benchmark comment. Docker changes from previous commit
will trigger image rebuilds. This run serves as warm-cache benchmark
after cold-cache run completes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/ml/src/lib.rs

@@ -1,4 +1,3 @@
-// sccache PVC benchmark: cold vs warm cache
 #![deny(clippy::unwrap_used, clippy::expect_used)]
 #![cfg_attr(test, allow(clippy::unwrap_used, clippy::expect_used))]
 #![allow(dead_code)] // 10 ML model implementations with internal architecture not yet fully wired