You'll need them on the server for remote debugging.
http://www.wintellect.com/CS/blogs/jrobbins/archive/2009/08/22/how-many-secrets-do-net-pdb-files-really-contain.aspx

>Is there a way to avoid the pdf file to be created in the Bin directory whenever I compile? I see this get added automatically even if I remove them. This does the same for all references I have. This does that on my development PC. But, on the servers, I do not need them. So, if there would be a way to avoid having them on my development PC, this would make the image looks closer to the server.