Remove duplicate comment line.
Prevent duplicate path names in a project's PYTHONPATH when creating src folders.

Previously, if a PyDev Project source folder was created with the same name as a path already
present in the project's PYTHONPATH, the created folder's path would be added as a duplicate.
Prevent this from happening by checking for existing pathnames before adding a new one.
Merge pull request #49 from AndrewFerr/aferrazz_dev

Prevent duplicate path names in a project's PYTHONPATH when creating src...