title: Remove duplicate data based on the same unix time
body: <p>multiple data on the same date. I am trying to remove the multiple data and have the data aligned based on the unix time given,
  I tried using remove duplicate but its not working</p>
  <pre><code>            time    x     y
  0  1648598400000  233  6758
  1  1648598400000  234  6758
  2  1648598403000  553  8678
  3  1648598404000  987  8778
  4  1648598405000  732  4535
  5  1648598406000  234  7656
  6  1648598406000  234  8977
  7  1648598406000  465  7656
  8  1648598406000  465  8977
  </code></pre>