Update `get_definitions()` to FastAPI 0.128.8

lib/galaxy/webapps/openapi/_compat/v2.py

@@ -8,7 +8,6 @@ from typing import (
 
 from fastapi._compat.v2 import (
     _has_computed_fields,
-    _remap_definitions_and_field_mappings,
     get_flat_models_from_fields,
     ModelField,
 )
@@ -53,8 +52,8 @@ def get_definitions(
         for model in flat_serialization_models
     ]
     flat_model_fields = flat_validation_model_fields + flat_serialization_model_fields
-    input_types = {f.type_ for f in fields}
-    unique_flat_model_fields = {f for f in flat_model_fields if f.type_ not in input_types}
+    input_types = {f.field_info.annotation for f in fields}
+    unique_flat_model_fields = {f for f in flat_model_fields if f.field_info.annotation not in input_types}
     inputs = [
         (
             field,
@@ -68,9 +67,9 @@ def get_definitions(
         if "description" in item_def:
             item_description = cast(str, item_def["description"]).split("\f")[0]
             item_def["description"] = item_description
-    new_mapping, new_definitions = _remap_definitions_and_field_mappings(
-        model_name_map=model_name_map,
-        definitions=definitions,  # type: ignore[arg-type]
-        field_mapping=field_mapping,
-    )
-    return new_mapping, new_definitions
+    # definitions: dict[DefsRef, dict[str, Any]]
+    # but mypy complains about general str in other places that are not declared as
+    # DefsRef, although DefsRef is just str:
+    # DefsRef = NewType('DefsRef', str)
+    # So, a cast to simplify the types here
+    return field_mapping, cast(dict[str, dict[str, Any]], definitions)