Remove allow(unknown_lints) and clippy::if_then_panic (#6000)

Author: waywardmonkeys

player/tests/test.rs

@@ -171,7 +171,6 @@ impl Test<'_> {
                     .collect::<Vec<u8>>(),
             };
 
-            #[allow(unknown_lints, clippy::if_then_panic)]
             if &expected_data[..] != contents {
                 panic!(
                     "Test expectation is not met!\nBuffer content was:\n{:?}\nbut expected:\n{:?}",

wgpu-hal/src/lib.rs

@@ -207,8 +207,6 @@
 #![allow(
     // this happens on the GL backend, where it is both thread safe and non-thread safe in the same code.
     clippy::arc_with_non_send_sync,
-    // for `if_then_panic` until it reaches stable
-    unknown_lints,
     // We don't use syntax sugar where it's not necessary.
     clippy::match_like_matches_macro,
     // Redundant matching is more explicit.
@@ -221,8 +219,6 @@
     clippy::single_match,
     // Push commands are more regular than macros.
     clippy::vec_init_then_push,
-    // "if panic" is a good uniform construct.
-    clippy::if_then_panic,
     // We unsafe impl `Send` for a reason.
     clippy::non_send_fields_in_send_ty,
     // TODO!

wgpu-types/src/lib.rs

@@ -1482,7 +1482,6 @@ impl Limits {
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub struct DownlevelLimits {}
 
-#[allow(unknown_lints)] // derivable_impls is nightly only currently
 #[allow(clippy::derivable_impls)]
 impl Default for DownlevelLimits {
     fn default() -> Self {