fix: Update non-streaming example (#3737)

* fix: Update non-streaming example

Also remove diuplicate region tag to disambiguate correct sample

* fix: Lint error

generative-ai/snippets/nonStreamingMultipartContent.js

@@ -54,16 +54,13 @@ async function createNonStreamingMultipartContent(
   console.log(request.contents[0].parts[1].text);
 
   console.log('Non-Streaming Response Text:');
-  // Create the response stream
-  const responseStream =
-    await generativeVisionModel.generateContentStream(request);
 
-  // Wait for the response stream to complete
-  const aggregatedResponse = await responseStream.response;
+  // Generate a response
+  const response = await generativeVisionModel.generateContent(request);
 
   // Select the text from the response
   const fullTextResponse =
-    aggregatedResponse.candidates[0].content.parts[0].text;
+    response.response.candidates[0].content.parts[0].text;
 
   console.log(fullTextResponse);
 }

generative-ai/snippets/streamMultipartContent.js

@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// [START generativeaionvertexai_gemini_get_started]
 // [START aiplatform_gemini_get_started]
 const {VertexAI} = require('@google-cloud/vertexai');
 
@@ -64,7 +63,6 @@ async function createStreamMultipartContent(
   }
 }
 // [END aiplatform_gemini_get_started]
-// [END generativeaionvertexai_gemini_get_started]
 
 createStreamMultipartContent(...process.argv.slice(2)).catch(err => {
   console.error(err.message);