Move useless_transmute back to complexity

clippy_lints/src/lib.register_all.rs

@@ -305,6 +305,7 @@ store.register_group(true, "clippy::all", Some("clippy_all"), vec![
     LintId::of(transmute::TRANSMUTE_NUM_TO_BYTES),
     LintId::of(transmute::TRANSMUTE_PTR_TO_REF),
     LintId::of(transmute::UNSOUND_COLLECTION_TRANSMUTE),
+    LintId::of(transmute::USELESS_TRANSMUTE),
     LintId::of(transmute::WRONG_TRANSMUTE),
     LintId::of(transmuting_null::TRANSMUTING_NULL),
     LintId::of(types::BORROWED_BOX),

clippy_lints/src/lib.register_complexity.rs

@@ -90,6 +90,7 @@ store.register_group(true, "clippy::complexity", Some("clippy_complexity"), vec!
     LintId::of(transmute::TRANSMUTE_INT_TO_FLOAT),
     LintId::of(transmute::TRANSMUTE_NUM_TO_BYTES),
     LintId::of(transmute::TRANSMUTE_PTR_TO_REF),
+    LintId::of(transmute::USELESS_TRANSMUTE),
     LintId::of(types::BORROWED_BOX),
     LintId::of(types::TYPE_COMPLEXITY),
     LintId::of(types::VEC_BOX),

clippy_lints/src/lib.register_nursery.rs

@@ -31,7 +31,6 @@ store.register_group(true, "clippy::nursery", Some("clippy_nursery"), vec![
     LintId::of(trait_bounds::TRAIT_DUPLICATION_IN_BOUNDS),
     LintId::of(trait_bounds::TYPE_REPETITION_IN_BOUNDS),
     LintId::of(transmute::TRANSMUTE_UNDEFINED_REPR),
-    LintId::of(transmute::USELESS_TRANSMUTE),
     LintId::of(unused_rounding::UNUSED_ROUNDING),
     LintId::of(use_self::USE_SELF),
 ])

clippy_lints/src/transmute/mod.rs

@@ -59,7 +59,7 @@ declare_clippy_lint! {
     /// ```
     #[clippy::version = "pre 1.29.0"]
     pub USELESS_TRANSMUTE,
-    nursery,
+    complexity,
     "transmutes that have the same to and from types or could be a cast/coercion"
 }
 

tests/ui/transmute_undefined_repr.rs

@@ -1,5 +1,5 @@
 #![warn(clippy::transmute_undefined_repr)]
-#![allow(clippy::unit_arg, clippy::transmute_ptr_to_ref)]
+#![allow(clippy::unit_arg, clippy::transmute_ptr_to_ref, clippy::useless_transmute)]
 
 use core::any::TypeId;
 use core::ffi::c_void;