Revert "Add api_key field to"

This reverts commit 1fec637.

Author: tgasser-nv

nemoguardrails/rails/llm/config.py

@@ -101,10 +101,7 @@ class Model(BaseModel):
         default=None,
         description="The name of the model. If not specified, it should be specified through the parameters attribute.",
     )
-    api_key: Optional[str] = Field(
-        default=None,
-        description="The API Key to use in requests to this model",
-    )
+
     reasoning_config: Optional[ReasoningModelConfig] = Field(
         default_factory=ReasoningModelConfig,
         description="Configuration parameters for reasoning LLMs.",

tests/test_rails_llm_config.py

@@ -123,18 +123,3 @@ def test_model_name_none_in_parameters():
     """Test that None model_name in parameters fails validation."""
     with pytest.raises(ValueError, match="Model name must be specified"):
         Model(type="main", engine="openai", parameters={"model_name": None})
-
-
-def test_model_api_key_not_set():
-    """Create a `Model` pydantic model without APi Key field"""
-    no_api_key_model = Model(type="main", engine="openai", model="gpt-4")
-    assert no_api_key_model.api_key is None
-
-
-def test_model_api_key_set():
-    """Create a `Model` pydantic model without APi Key field"""
-    api_key = "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"
-    no_api_key_model = Model(
-        type="main", engine="openai", model="gpt-4", api_key=api_key
-    )
-    assert no_api_key_model.api_key == api_key