Removed deprecated code marked in 5.0.x : oxUtilsFile::getInstance

Removed usages and function
Removed deprecated code marked in 5.0.x : oxUtilsPic::getInstance

Removed usages and function
Removed deprecated code marked in 5.0.x : oxUtilsServer::getInstance

Removed usages and function
Removed deprecated code marked in 5.0.x : oxUtilsString::getInstance

Removed usages and function
Removed "return null" from comment
Removed deprecated code marked in 5.0.x : oxUtilsUrl::getInstance

Removed usages and function
Removed deprecated code marked in 5.0.x : oxUtilsView::getInstance

Removed usages and function
Removed deprecated code marked in 5.0.x : oxEmosAdapter::getInstance

Removed usages and function
Removed deprecated code marked in 5.0.x : oxBasket::getDiscountedNettoPrice

Removed function and tests
Removed deprecated code marked in 5.0.x: returned getActCategory