🔥 Remove test for unique_items as it was removed from Pydantic v2

tests/test_pydantic/test_field.py

@@ -1,5 +1,5 @@
 from decimal import Decimal
-from typing import List, Optional, Union
+from typing import Optional, Union
 
 import pytest
 from pydantic import ValidationError
@@ -22,16 +22,6 @@ class Model(SQLModel):
         Model(dec=Decimal("420"))
 
 
-def test_unique_items():
-    class Model(SQLModel):
-        unique_strings: List[str] = Field(unique_items=True)
-
-    Model(unique_strings=["x", "y"])
-
-    with pytest.raises(ValidationError):
-        Model(unique_strings=["x", "y", "x"])
-
-
 def test_discriminator():
     # Example adapted from
     # [Pydantic docs](https://pydantic-docs.helpmanual.io/usage/types/#discriminated-unions-aka-tagged-unions):