Remove changes in archived samples

Author: sakthivelmanii

samples/snippets/src/main/java/com/example/spanner/admin/archived/SpannerSample.java

@@ -1571,47 +1571,6 @@ static void queryWithQueryOptions(DatabaseClient dbClient) {
   }
   // [END spanner_query_with_query_options]
 
-  // [START spanner_isolation_level_settings]
-  static void isolationLevelSetting(DatabaseId db) {
-    // The isolation level specified at the client-level will be applied to all
-    // RW transactions.
-    DefaultReadWriteTransactionOptions transactionOptions =
-        DefaultReadWriteTransactionOptions.newBuilder()
-            .setIsolationLevel(IsolationLevel.SERIALIZABLE)
-            .build();
-    SpannerOptions options =
-        SpannerOptions.newBuilder()
-            .setDefaultTransactionOptions(transactionOptions)
-            .build();
-    Spanner spanner = options.getService();
-    DatabaseClient dbClient = spanner.getDatabaseClient(db);
-    dbClient
-        // The isolation level specified at the transaction-level takes precedence
-        // over the isolation level configured at the client-level.
-        .readWriteTransaction(Options.isolationLevel(IsolationLevel.REPEATABLE_READ))
-        .run(transaction -> {
-          // Read an AlbumTitle.
-          String select_sql =
-              "SELECT AlbumTitle from Albums WHERE SingerId = 1 and AlbumId = 1";
-          ResultSet resultSet = transaction.executeQuery(Statement.of(select_sql));
-          String title = null;
-          while (resultSet.next()) {
-            title = resultSet.getString("AlbumTitle");
-          }
-          System.out.printf("Current album title: %s\n", title);
-
-          // Update the title.
-          String update_sql =
-              "UPDATE Albums "
-                  + "SET AlbumTitle = 'New Album Title' "
-                  + "WHERE SingerId = 1 and AlbumId = 1";
-          long rowCount = transaction.executeUpdate(Statement.of(update_sql));
-          System.out.printf("%d record updated.\n", rowCount);
-          return null;
-        });
-  }
-  // [END spanner_isolation_level_settings]
-
   // [START spanner_create_backup]
   static void createBackup(DatabaseAdminClient dbAdminClient, DatabaseId databaseId,
       BackupId backupId, Timestamp versionTime) {
@@ -2116,9 +2075,6 @@ static void run(
       case "querywithqueryoptions":
         queryWithQueryOptions(dbClient);
         break;
-      case "isolationlevelsettings":
-        isolationLevelSetting(database);
-        break;
       case "createbackup":
         createBackup(dbAdminClient, database, backup, getVersionTime(dbClient));
         break;
@@ -2223,7 +2179,6 @@ static void printUsageAndExit() {
     System.err.println("    SpannerExample querywithtimestampparameter my-instance example-db");
     System.err.println("    SpannerExample clientwithqueryoptions my-instance example-db");
     System.err.println("    SpannerExample querywithqueryoptions my-instance example-db");
-    System.err.println("    SpannerExample isolationlevelsettings my-instance example-db");
     System.err.println("    SpannerExample createbackup my-instance example-db");
     System.err.println("    SpannerExample listbackups my-instance example-db");
     System.err.println("    SpannerExample listbackupoperations my-instance example-db backup-id");