Add unused-import check.

Author: Jerjou Cheng

bigquery/src/main/java/com/google/cloud/bigquery/samples/GettingStarted.java

@@ -15,42 +15,19 @@
 package com.google.cloud.bigquery.samples;
 
 // [START all]
-import com.google.api.client.auth.oauth2.Credential;
-import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
-import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
-import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
-import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeRequestUrl;
-import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
 import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
-import com.google.api.client.googleapis.auth.oauth2.GoogleTokenResponse;
 import com.google.api.client.http.HttpTransport;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.JsonFactory;
 import com.google.api.client.json.jackson2.JacksonFactory;
-import com.google.api.client.util.store.DataStoreFactory;
-import com.google.api.client.util.store.FileDataStoreFactory;
-import com.google.api.services.bigquery.Bigquery.Datasets;
-import com.google.api.services.bigquery.Bigquery.Jobs.Insert;
 import com.google.api.services.bigquery.Bigquery;
 import com.google.api.services.bigquery.BigqueryScopes;
-import com.google.api.services.bigquery.model.DatasetList;
 import com.google.api.services.bigquery.model.GetQueryResultsResponse;
-import com.google.api.services.bigquery.model.Job;
-import com.google.api.services.bigquery.model.JobConfiguration;
-import com.google.api.services.bigquery.model.JobConfigurationQuery;
-import com.google.api.services.bigquery.model.JobReference;
 import com.google.api.services.bigquery.model.QueryRequest;
 import com.google.api.services.bigquery.model.QueryResponse;
 import com.google.api.services.bigquery.model.TableCell;
 import com.google.api.services.bigquery.model.TableRow;
 
-import java.io.BufferedReader;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.Reader;
-import java.util.Arrays;
 import java.util.List;
 import java.util.Scanner;
 

google-checks.xml

@@ -30,6 +30,7 @@
         </module>
 
     <module name="TreeWalker">
+        <module name="UnusedImports"/>
         <module name="OuterTypeFilename"/>
         <module name="IllegalTokenText">
             <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>