Remove obsolete assessment import test
Remove obsolete assessment import test

Assessment import tests will be moved to a different file and should
consist of the new columns and object level custom attributes. There is
no need for keeping track of these obsolete tests from now on.

j0gurt/ggrc-core,plamut/ggrc-core,VinnieJohns/ggrc-core,andrei-karalionak/ggrc-core,edofic/ggrc-core,VinnieJohns/ggrc-core,selahssea/ggrc-core,josthkko/ggrc-core,VinnieJohns/ggrc-core,selahssea/ggrc-core,josthkko/ggrc-core,j0gurt/ggrc-core,andrei-karalionak/ggrc-core,andrei-karalionak/ggrc-core,kr41/ggrc-core,j0gurt/ggrc-core,selahssea/ggrc-core,VinnieJohns/ggrc-core,AleksNeStu/ggrc-core,andrei-karalionak/ggrc-core,kr41/ggrc-core,AleksNeStu/ggrc-core,josthkko/ggrc-core,kr41/ggrc-core,AleksNeStu/ggrc-core,kr41/ggrc-core,edofic/ggrc-core,plamut/ggrc-core,j0gurt/ggrc-core,edofic/ggrc-core,edofic/ggrc-core,josthkko/ggrc-core,selahssea/ggrc-core,AleksNeStu/ggrc-core,plamut/ggrc-core,plamut/ggrc-core