Merge #10: Remove unused file

32caa6e Remove unused file (Tobin C. Harding)

Pull request description:

  Fail; during import of code from `bitcoin::psbt` I left `mod.rs` in the repo even after copying it to `lib.rs`.

ACKs for top commit:
  pythcoiner:
    ACK 32caa6e

Tree-SHA512: 25baf31aa8252abbd89e5313c89f006417d0343fbaec506980867cfdde205f223f1107a33ca65eb021afb833cf32b8ee5f103004706c08ebc5f3cd98783c2a3b