Revert "add a check again link when upload validation times out (bug 957158)"

This reverts commit 1feca1a821fa8dd4224ecdf0e1ef5097964b670b.
This unfortunately did not solve the problem of some addons failing to upload.
Update pfs.py
Merge pull request #107 from jpfeif66/patch-4

bug 1019980; Update pfs.py