The REMOVESLOPEPATTERN the command was developed to streamline one of the Slope Pattern of Civil 3D corridors.
In very large corridors, adding the Slope Pattern can be very time consuming and Plus, Civil 3D's performance drops dramatically when it needs to rebuild.
The addition of these slope patterns is recommended only at the end of the modeling, since which reduces performance. But if you added them and noticed a lot fall large, remove the slope pattern using this command.
See also: ADDSLOPEPATTERN.