Remove DiagnosticBuilder::delay_as_bug_without_consuming.

This is nice.

Author: nnethercote

compiler/rustc_errors/src/diagnostic_builder.rs

@@ -370,13 +370,6 @@ impl<'a, G: EmissionGuarantee> DiagnosticBuilder<'a, G> {
         self.emit()
     }
 
-    /// Non-consuming variant of `delay_as_bug`.
-    #[track_caller]
-    pub fn delay_as_bug_without_consuming(&mut self) -> G::EmitResult {
-        self.downgrade_to_delayed_bug();
-        G::emit_producing_guarantee(self)
-    }
-
     forward!((span_label, span_label_mv)(span: Span, label: impl Into<SubdiagnosticMessage>));
     forward!((span_labels, span_labels_mv)(spans: impl IntoIterator<Item = Span>, label: &str));
     forward0!(pub fn note_expected_found(