To remove a path, you need to follow three steps. First of all, select the construction menu on the top right, then select the removal mode. Mark the path you wish to remove by clicking on it with your left mouse button. You'll now see a green dot and have two options:
1. You only wish to remove this part of the path. In this case, please click the same spot to mark the ending point. So what you do is you mark the starting and ending point with two brief clicks, to mark the path for removal. Now click next to this field to tell the system you are done marking the path and you wish to remove it. After a brief animation, it will land in your inventory.
2. You also want to remove an adjacent path. In this case also mark the parts of the path with your left-hand mouse button. Once you have marked all pieces of the path, click next to the fields you marked and as in case 1), the entire path will be removed and stocked.