chore: remove duplicate OpenAI and Gemini data validators (#3513)

# What does this PR do?

removes the duplicate OpenAI/GeminiProviderDataValidator

the active ones are in config.pys


## Test Plan

ci

Author: mattf

llama_stack/providers/remote/inference/gemini/__init__.py

@@ -4,15 +4,9 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from pydantic import BaseModel
-
 from .config import GeminiConfig
 
 
-class GeminiProviderDataValidator(BaseModel):
-    gemini_api_key: str | None = None
-
-
 async def get_adapter_impl(config: GeminiConfig, _deps):
     from .gemini import GeminiInferenceAdapter
 

llama_stack/providers/remote/inference/openai/__init__.py

@@ -4,15 +4,9 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from pydantic import BaseModel
-
 from .config import OpenAIConfig
 
 
-class OpenAIProviderDataValidator(BaseModel):
-    openai_api_key: str | None = None
-
-
 async def get_adapter_impl(config: OpenAIConfig, _deps):
     from .openai import OpenAIInferenceAdapter