Removed in version 57, Any existing Ramp blocks were converted into Normal Blocks.Ramp blocks are the same as Blocks that are at a 45 Degree angle. To change the angle, you could press 'R' or double click to bring up a button to change block shape.
When Version 57 launched, any surviving Ramp blocks were changed into REDACTEDs These ramps had a red squiggle through them as well. After a day or two the ramps that were placed or unplaced were made into the new version of Blocks.