Remove unmatched cfg and unused rustup component.

.github/workflows/ci.yml

@@ -44,7 +44,7 @@ jobs:
         with:
           toolchain: 1.56.0
           targets: x86_64-unknown-linux-gnu
-          components: clippy,rust-src
+          components: rust-src
       - uses: actions/setup-python@v4
         with:
           architecture: "x64"

pyo3-build-config/src/lib.rs

@@ -161,11 +161,6 @@ pub fn print_feature_cfgs() {
     if rustc_minor_version >= 59 {
         println!("cargo:rustc-cfg=thread_local_const_init");
     }
-
-    // Enable use of `#[cfg(panic = "...")]` on Rust 1.60 and greater
-    if rustc_minor_version >= 60 {
-        println!("cargo:rustc-cfg=panic_unwind");
-    }
 }
 
 /// Private exports used in PyO3's build.rs

tests/test_class_attributes.rs

@@ -96,7 +96,6 @@ fn recursive_class_attributes() {
 }
 
 #[test]
-#[cfg_attr(cfg_panic, cfg(panic = "unwind"))]
 fn test_fallible_class_attribute() {
     use pyo3::{exceptions::PyValueError, types::PyString};