3ac9b2ded2 Remove unnecessary type (Tobin C. Harding)
Pull request description:
`hex_psbt` returns `Psbt`, no need for the explicit type.
Internal change only.
ACKs for top commit:
shinghim:
ACK 3ac9b2ded2
apoelstra:
ACK 3ac9b2ded24d5428945538c0a674301f6094df96; successfully ran local tests
Tree-SHA512: 2be1bfa56729bf97e60d721a184d3d21bfb27115fab1dd1b9103428658b5faca012d8f01e0458be7f17dadcd8cc495b327f2b472d825d46aa5cb71d0906ecb21