Remove unnecessary clippy override

The clippy override `allow(deref_nullptr)` is no longer needed since the
issue has been fixed from rust-bindgen [1].

[1] rust-lang/rust-bindgen#1651

Signed-off-by: Bo Chen <[email protected]>

Author: likebreath

src/arm64/mod.rs

@@ -3,8 +3,6 @@
 
 #[allow(clippy::all)]
 #[allow(clippy::undocumented_unsafe_blocks)]
-// Keep this until https://github.com/rust-lang/rust-bindgen/issues/1651 is fixed.
-#[cfg_attr(test, allow(deref_nullptr))]
 pub mod bindings;
 #[cfg(feature = "fam-wrappers")]
 pub mod fam_wrappers;

src/x86_64/mod.rs

@@ -2,8 +2,6 @@
 // SPDX-License-Identifier: Apache-2.0
 #[allow(clippy::undocumented_unsafe_blocks)]
 #[allow(clippy::all)]
-// Keep this until https://github.com/rust-lang/rust-bindgen/issues/1651 is fixed.
-#[cfg_attr(test, allow(deref_nullptr))]
 pub mod bindings;
 #[cfg(feature = "fam-wrappers")]
 pub mod fam_wrappers;