chore: Remove redundant disjoint spans assert

Author: Muscraft

compiler/rustc_errors/src/diagnostic.rs

@@ -945,11 +945,6 @@ impl<'a, G: EmissionGuarantee> Diag<'a, G> {
             None,
             "Span must not be empty and have no suggestion",
         );
-        debug_assert_eq!(
-            parts.array_windows().find(|[a, b]| a.span.overlaps(b.span)),
-            None,
-            "suggestion must not have overlapping parts",
-        );
 
         self.push_suggestion(CodeSuggestion {
             substitutions: vec![Substitution { parts }],