Remove Duplicate Text From A String In A Row Of Cells

I have a large worksheet and I managed to duplicate data in a row of cells.

MOT 1/F1,
B/P 1f2,
B/P 1f2


In the string above I need to delete all text from the first comma to the end of the string so the above would look like:

MOT 1/F1

This is an example in one cell of many. The text prior to the first comma may or may not repeat and it is the only portion of the text I wish to keep. The first comma is not always in the same place (character count position).