6836de9ee6 Remove catch all pattern (Tobin C. Harding)
Pull request description:
The `PushBytes` type enforces len is less than 0x100000000 so we do not need to panic in a catch all pattern after explicitly matching against less than 0x100000000.
Refactor only because of the invariant on `PushBytes` - no logic changes.
ACKs for top commit:
apoelstra:
ACK 6836de9ee6 successfully ran local tests
Kixunil:
ACK 6836de9ee6
Tree-SHA512: a7cdb31683a8c00eecbdd0879886bec48133f9029f899b5279f1f5294ef40320592db196bfcafdeef4507636fc785a7ab87879b25b6d1b4905ae573b545f1ff4
2dac88b416