Update edition-changes.md

Author: Centril

src/rust-2018/edition-changes.md

@@ -33,7 +33,6 @@ the 2018 edition compared to the 2015 edition.
 [Path changes]: rust-2018/module-system/path-clarity.html
 [Trait function parameters]: https://doc.rust-lang.org/stable/reference/items/traits.html#parameter-patterns
 [`dyn`]: rust-2018/trait-system/dyn-trait-for-trait-objects.html
-[overflowing_literals]: https://github.com/rust-lang/rfcs/blob/master/text/2438-deny-integer-literal-overflow-lint.md
 [reserved keywords]: https://doc.rust-lang.org/reference/keywords.html#reserved-keywords
 [strict keyword]: https://doc.rust-lang.org/reference/keywords.html#strict-keywords
 [tyvar_behind_raw_pointer]: https://github.com/rust-lang/rust/issues/46906