Remove SSLVerificationMixin from OCIModelConfig

ChatOCIGenAI and the OCI SDK client do not support a verify_ssl
kwarg, so exposing the field on the public config surface was
misleading. Drop the unused mixin to keep the config honest.

Author: fede-kamel

packages/nvidia_nat_core/src/nat/llm/oci_llm.py

@@ -27,10 +27,9 @@
 from nat.data_models.optimizable import OptimizableMixin
 from nat.data_models.optimizable import SearchSpace
 from nat.data_models.retry_mixin import RetryMixin
-from nat.data_models.ssl_verification_mixin import SSLVerificationMixin
 from nat.data_models.thinking_mixin import ThinkingMixin
 
-class OCIModelConfig(LLMBaseConfig, RetryMixin, OptimizableMixin, ThinkingMixin, SSLVerificationMixin, name="oci"):
+class OCIModelConfig(LLMBaseConfig, RetryMixin, OptimizableMixin, ThinkingMixin, name="oci"):
     """OCI Generative AI LLM provider."""
 
     model_config = ConfigDict(protected_namespaces=(), extra="allow")