How to remove duplicate lines but save one of the lines?

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Тема How to remove duplicate lines but save one of the lines?
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Msg-id dbbf25900807210833y649b5d0as21d18282dd28aa13@mail.gmail.com
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Ответы Re: How to remove duplicate lines but save one of the lines?
Re: How to remove duplicate lines but save one of the lines?
Re: How to remove duplicate lines but save one of the lines?
Re: How to remove duplicate lines but save one of the lines?
Re: How to remove duplicate lines but save one of the lines?
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I have a table with rows like this
A 1
A 1
B 3
B 3
C 44
C 44
and so on.

and I want it to be
A 1
B 3
C 44

so how can I remove the all the duplicate lines but one?

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