Out of box there is no such method . So you have to deisgn your own logic using custom java.
Coming to your requirement now, it can probably be done in a two stage process.
1. Create an agent that runs every day at a particular time
2. In that agent write an activity which does two things. First , check the file creation date of the files present in the folder. And then have a check whether it is more than a month or not. If yes then move to next step to delete the file. You can try simple java File.delete() and pass the folder location as parameter.