Remove unneeded check to make sure annotation is truthy

Author: tselepakis

pydantic_settings/sources/base.py

@@ -356,7 +356,7 @@ def _extract_field_info(self, field: FieldInfo, field_name: str) -> list[tuple[s
 
         if not v_alias or self.config.get('populate_by_name', False):
             annotation = field.annotation
-            if annotation and typing_objects.is_typealiastype(annotation):
+            if typing_objects.is_typealiastype(annotation):
                 annotation = _strip_annotated(annotation.__value__)
             if is_union_origin(get_origin(annotation)) and _union_is_complex(annotation, field.metadata):
                 field_info.append((field_name, self._apply_case_sensitive(self.env_prefix + field_name), True))