Remove straggler models

docs/patterns/interactivity.mdx

@@ -67,8 +67,10 @@ Here's a complete example of an interactive survey:
 ```python Code
 import marvin
 from typing import Literal
+from dataclasses import dataclass
 
-class Survey(marvin.Model):
+@dataclass
+class Survey:
     name: str
     age: int
     interests: list[str]

docs/patterns/task-results.mdx

@@ -246,14 +246,16 @@ Pydantic models (recommended) provide rich validation and nested structures:
 
 ```python
 import marvin
-from marvin import Model
+from dataclasses import dataclass
 
-class Person(Model):
+@dataclass
+class Person:
     name: str
     age: int
     interests: list[str]
 
-class Movie(Model):
+@dataclass
+class Movie:
     title: str
     director: Person
     year: int
@@ -272,6 +274,7 @@ people = marvin.run(
     "List the main characters in Star Wars",
     result_type=list[Person]
 )
+print(people[0].name)  # "Luke Skywalker"
 ```
 
 ## Validation