Removes fragile tests which depend on rustc output

CHANGELOG.md

@@ -25,6 +25,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   default; set `debug_headers = true` (or `ROCKET_DEBUG_HEADERS=true`) to
   restore the previous behavior.
 
+### Removed
+
+- Codegen UI tests that only asserted `rustc`'s own type-error output
+  (`route-type-errors`, `catch_type_errors`, `from_form_type_errors`,
+  `responder-types`, `typed-uri-bad-type`, `uri_display_type_errors`). These
+  broke on nearly every toolchain update without guarding any of the macros'
+  own diagnostics, which remain covered by the surviving UI tests.
+
 ## 1.0.1 - 2026-06-23
 
 ### Fixed

core/codegen/tests/ui-fail-nightly/from_form.stderr

@@ -546,6 +546,7 @@ error[E0277]: the trait bound `bool: From<&str>` is not satisfied
     = help: `bool` implements trait `From<T>`:
               From<format_description::parse::format_item::HourBase>
               From<format_description::parse::format_item::MonthCaseSensitive>
+              From<format_description::parse::format_item::OptionalFormat>
               From<format_description::parse::format_item::PeriodCase>
               From<format_description::parse::format_item::PeriodCaseSensitive>
               From<format_description::parse::format_item::SignBehavior>