Creating Save and Load Systems - Unity Game Development Scripting - page 161

Deleting our flat files
Next, we create a function that allows us to delete flat files. Add this function to your
script:
void DeleteFile(string file = "")
{
File.Delete(sDirectory + file);
}
To delete a file, we use the Delete function within the File class. Before we delete
the file, we make sure that it actually exists using the Exists function within the File
class. The file that we are deleting is the one that is set to our directory and filename
variables.