How to remove repeating elements from two columns in Excel

I have two columns for example:

A      B

1      2

1      3

1      5

3      4

2      1

4      3

I want the output to come like this:

A      B

1      2

1      3

1      5

3      4

I want to remove the data which gets repeated from 1 column to another. Is there any function in excel to do so?