[GH-3723] Vertex AI Gemini logprobs support

Closes GH-3723

Signed-off-by: Rodrigo Malara <[email protected]>

Author: rodrigomalara

models/spring-ai-vertex-ai-gemini/src/main/java/org/springframework/ai/vertexai/gemini/VertexAiGeminiChatModel.java

@@ -592,7 +592,6 @@ protected List<Generation> responseCandidateToGeneration(Candidate candidate) {
 				.toList()))
 			.toList();
 
-		// Convert from VertexAI protobuf to VertexAiGeminiApi DTOs
 		List<VertexAiGeminiApi.LogProbs.Content> chosenCandidates = candidate.getLogprobsResult()
 			.getChosenCandidatesList()
 			.stream()