sdks/python: fix linting issues

Author: mohamedawnallah

sdks/python/apache_beam/ml/rag/embeddings/open_ai.py

@@ -18,8 +18,6 @@
 
 from typing import Optional
 
-import openai
-
 import apache_beam as beam
 from apache_beam.ml.inference.base import RunInference
 from apache_beam.ml.rag.embeddings.base import create_rag_adapter

sdks/python/apache_beam/ml/transforms/embeddings/open_ai.py

@@ -103,7 +103,7 @@ def request(
   ) -> Iterable:
     """Makes a request to OpenAI embedding API and returns embeddings."""
     # Prepare arguments for the API call
-    kwargs = {
+    kwargs: dict[str, Any] = {
         "model": self.model_name,
         "input": batch,
     }