How to reduce Rindler metric to falt one

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How can we using calculation Riemann tensor to reduce Rindler metric to flat one.
 
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The Rindler metric is a coordinate transformation of the Minkowski metric, so it is flat. To get the Minkowski metric from the Rindler metric, use the reverse transformation. http://en.wikipedia.org/wiki/Rindler_space
 

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