下面是一个 JavaScript 脚本示例，它可以去除指定 Google Sheet 中的重复行，并且可以删除该表格。

function deleteDuplicates() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getActiveSheet();
  var rows = sheet.getDataRange();
  var numRows = rows.getNumRows();
  var values = rows.getValues();
  
  // Create a new array to store unique rows
  var uniqueRows = [];
  var dups = 0;  // Keep track of the number of duplicates
  
  // Loop through each row
  for (var i = 0; i < numRows; i++) {
    var row = values[i];
    
    // Check if the row is unique
    if (uniqueRows.indexOf(row.join()) == -1) {
      uniqueRows.push(row.join());
    } else {
      // If the row is not unique, delete it
      sheet.deleteRow(i + 1 - dups);
      dups++;
    }
  }
  
  // If there were duplicates, show a message to the user
  if (dups > 0) {
    Browser.msgBox("Deleted " + dups + " duplicate rows.");
    
    // If there are no more rows left, delete the sheet
    if (numRows == dups) {
      ss.deleteActiveSheet();
    }
  } else {
    Browser.msgBox("No duplicate rows found.");
  }
}

要使用此脚本，请在 Google Sheet 中打开 Script 编辑器，并将其粘贴到脚本编辑器中。您可以使用“即时执行”（菜单栏中的“运行”按钮）来运行此脚本，或者为其创建一个自定义菜单或触发器。