chore: remove lint pointer_structural_match

lint `pointer_structural_match` has been removed:
converted into hard error,
see [RFC #3535][3535] for more information.

[3535]: https://rust-lang.github.io/rfcs/3535-constants-in-patterns.html

src/main.rs

@@ -20,7 +20,6 @@
 #![deny(
     // fuzzy_provenance_casts, UNSTABLE: https://github.com/rust-lang/rust/issues/95228
     // lossy_provenance_casts, UNSTABLE: https://github.com/rust-lang/rust/issues/95228
-    pointer_structural_match,
     unsafe_code // Exceptions must be discussed and deemed indispensable and use `#![deny(invalid_reference_casting, unsafe_op_in_unsafe_fn)]`.
 )]
 // Opt-in to allowed-by-default clippy lints