Remove duplicate type_diagnostic_name function

Author: Alexendoo

clippy_lints/src/eta_reduction.rs

@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::{span_lint_and_sugg, span_lint_and_then};
 use clippy_utils::higher::VecArgs;
 use clippy_utils::source::snippet_opt;
-use clippy_utils::ty::type_diagnostic_name;
+use clippy_utils::ty::get_type_diagnostic_name;
 use clippy_utils::usage::{local_used_after_expr, local_used_in};
 use clippy_utils::{get_path_from_caller_to_method_type, is_adjusted, path_to_local, path_to_local_id};
 use rustc_errors::Applicability;
@@ -139,7 +139,7 @@ fn check_clousure<'tcx>(cx: &LateContext<'tcx>, outer_receiver: Option<&Expr<'tc
         {
             let callee_ty_raw = typeck.expr_ty(callee);
             let callee_ty = callee_ty_raw.peel_refs();
-            if matches!(type_diagnostic_name(cx, callee_ty), Some(sym::Arc | sym::Rc))
+            if matches!(get_type_diagnostic_name(cx, callee_ty), Some(sym::Arc | sym::Rc))
                 || !check_inputs(typeck, body.params, None, args)
             {
                 return;

clippy_utils/src/ty.rs

@@ -455,11 +455,6 @@ pub fn is_type_lang_item(cx: &LateContext<'_>, ty: Ty<'_>, lang_item: LangItem)
     }
 }
 
-/// Gets the diagnostic name of the type, if it has one
-pub fn type_diagnostic_name(cx: &LateContext<'_>, ty: Ty<'_>) -> Option<Symbol> {
-    ty.ty_adt_def().and_then(|adt| cx.tcx.get_diagnostic_name(adt.did()))
-}
-
 /// Return `true` if the passed `typ` is `isize` or `usize`.
 pub fn is_isize_or_usize(typ: Ty<'_>) -> bool {
     matches!(typ.kind(), ty::Int(IntTy::Isize) | ty::Uint(UintTy::Usize))