Delete a file name and possibly the file it refers to, based on an open directory handle.
On Windows, sub_path should be encoded as WTF-8.
On WASI, sub_path should be encoded as valid UTF-8.
On other platforms, sub_path is an opaque sequence of bytes with no particular encoding.
Asserts that the path parameter has no null bytes.
pub fn deleteFile(dir: Dir, io: Io, sub_path: []const u8) DeleteFileError!void
pub fn deleteFile(dir: Dir, io: Io, sub_path: []const u8) DeleteFileError!void {
return io.vtable.dirDeleteFile(io.userdata, dir, sub_path);
}