Also removes the code to enforce those limits, including the
`-datacarrier` and `-datacarriersize` config options.
These limits are easily bypassed by both direct submission to miner
mempools (e.g. MARA Slipstream), and forks of Bitcoin Core that do not
enforce them (e.g. Libre Relay). Secondly, protocols are bypassing them
by simply publishing data in other ways, such as unspendable outputs and
scriptsigs.
The *form* of datacarrier outputs remains standardized: a single
OP_Return followed by zero or more data pushes; non-data opcodes remain
non-standard.
The timeout is due to outstanding txrequests with
python peers. Fix this by disconnecting these peers
after they send their txns, they aren't needed after
this point anyway.
