strip out submissions environment helper methods that were erroneously re-included in assignment spec after rebase
strip out submissions environment helper methods that were erroneously re-included in assignment spec after rebase

mkoon/gradecraft-development,UM-USElab/gradecraft-development,UM-USElab/gradecraft-development,UM-USElab/gradecraft-development,UM-USElab/gradecraft-development,mkoon/gradecraft-development,mkoon/gradecraft-development