How to remove a specific entry from a number of entries separated by comma?

I have some entries in a csv file like below

John, 20, LA, USA
Jane, 50, NY, USA
Jim, 38, PH, USA

How can I remove the second entry from all lines in vim editor so that it looks like the following?

John, LA, USA
Jane, NY, USA
Jim, PH, USA

>Solution :

This should work:

:%s/^\([^,]\+,\) [^,]\+,/\1/