Remove debugging line.

Author: cjgillot

compiler/rustc_query_system/src/query/plumbing.rs

@@ -680,11 +680,6 @@ pub(crate) fn incremental_verify_ich<Tcx, V>(
     });
 
     let old_hash = dep_graph_data.prev_fingerprint_of(prev_index);
-    debug!(
-        dep_node = ?tcx.dep_graph().data().unwrap().prev_node_of(prev_index),
-        ?new_hash, ?old_hash,
-    );
-
     if new_hash != old_hash {
         incremental_verify_ich_failed(tcx, prev_index, &|| format_value(&result));
     }