Revert "Auto merge of #101620 - cjgillot:compute_lint_levels_by_def, r=oli-obk"

This reverts commit 2cb9a65684, reversing
changes made to 750bd1a7ff.

compiler/rustc_lint/src/expect.rs

@@ -16,10 +16,8 @@ fn check_expectations(tcx: TyCtxt<'_>, tool_filter: Option<Symbol>) {
         return;
     }
 
-    let lint_expectations = tcx.lint_expectations(());
     let fulfilled_expectations = tcx.sess.diagnostic().steal_fulfilled_expectation_ids();
-
-    tracing::debug!(?lint_expectations, ?fulfilled_expectations);
+    let lint_expectations = &tcx.lint_levels(()).lint_expectations;
 
     for (id, expectation) in lint_expectations {
         // This check will always be true, since `lint_expectations` only