feat(generative-ai): clear unused samples and update gemini model name

ai-platform/snippets/batch-prediction/batch-predict-bq.js

@@ -36,7 +36,7 @@ async function main(projectId, outputUri) {
     'bq://storage-samples.generative_ai.batch_requests_for_multimodal_input';
   const location = 'us-central1';
   const parent = `projects/${projectId}/locations/${location}`;
-  const modelName = `${parent}/publishers/google/models/gemini-1.5-flash-002`;
+  const modelName = `${parent}/publishers/google/models/gemini-2.0-flash-001`;
 
   // Specify the location of the api endpoint.
   const clientOptions = {

ai-platform/snippets/batch-prediction/batch-predict-gcs.js

@@ -39,7 +39,7 @@ async function main(projectId, outputUri) {
     'gs://cloud-samples-data/generative-ai/batch/batch_requests_for_multimodal_input.jsonl';
   const location = 'us-central1';
   const parent = `projects/${projectId}/locations/${location}`;
-  const modelName = `${parent}/publishers/google/models/gemini-1.5-flash-002`;
+  const modelName = `${parent}/publishers/google/models/gemini-2.0-flash-001`;
 
   // Specify the location of the api endpoint.
   const clientOptions = {