fix error messages

Author: jdonszelmann

compiler/rustc_passes/messages.ftl

@@ -438,11 +438,6 @@ passes_invalid_macro_export_arguments = `{$name}` isn't a valid `#[macro_export]
 
 passes_invalid_macro_export_arguments_too_many_items = `#[macro_export]` can only take 1 or 0 arguments
 
-passes_lang_item_fn = {$name ->
-    [panic_impl] `#[panic_handler]`
-    *[other] `{$name}` lang item
-} function
-
 passes_lang_item_on_incorrect_target =
     `{$name}` lang item must be applied to a {$expected_target}
     .label = attribute should be applied to a {$expected_target}, not a {$actual_target}
@@ -761,12 +756,6 @@ passes_trait_impl_const_stable =
 passes_transparent_incompatible =
     transparent {$target} cannot have other repr hints
 
-passes_undefined_naked_function_abi =
-    Rust ABI is unsupported in naked functions
-
-passes_unknown_external_lang_item =
-    unknown external lang item: `{$lang_item}`
-
 passes_unknown_feature =
     unknown feature `{$feature}`