Removed unused contracts, interfaces, scripts, and docs

[jalextowle]

This PR removes several files in order to de-clutter the codebase prior to the audit and focus the auditors attention on the things that really matter. The following were significant removals:

1. contracts/src/token/BondWrapper.sol: While this is something that will likely be useful in the future, we don't have any plans to use it in the short-term, and it isn't in scope for the first audit. The contract will still be in our git history, and we have issues relating to the BondWrapper that are still open, so we won't lose this work.
2. docs/protocol_spec.md: This doc is long out-of-date. We will ultimately want an up-to-date protocol spec, but it will probably be easier to restart rather than trying to turn this into what we want it to be.

All of the other deletions were deleting things that were no longer used. The decodeError functionality was removed from HyperdriveTest because it wasn't well maintained and can be substituted with the use of forge selectors list and grep.

[jrhea]

feels good

[github-actions]

Hyperdrive Gas Benchmark

Benchmark suite	Current: ec5b694	Previous: 78dee14	Deviation	Status
addLiquidity: min	1633 gas	1633 gas	0%	🟰
addLiquidity: avg	67045 gas	65418 gas	2.4871%	🚨
addLiquidity: max	292045 gas	292045 gas	0%	🟰
checkpoint: min	1150 gas	1150 gas	0%	🟰
checkpoint: avg	48602 gas	48538 gas	0.1319%	🚨
checkpoint: max	191003 gas	191003 gas	0%	🟰
closeLong: min	1558 gas	1558 gas	0%	🟰
closeLong: avg	28112 gas	28103 gas	0.0320%	🚨
closeLong: max	151196 gas	151196 gas	0%	🟰
closeShort: min	1549 gas	1549 gas	0%	🟰
closeShort: avg	29795 gas	29854 gas	-0.1976%	✅
closeShort: max	125618 gas	145678 gas	-13.7701%	✅
initialize: min	1582 gas	1582 gas	0%	🟰
initialize: avg	213352 gas	213322 gas	0.0141%	🚨
initialize: max	255137 gas	255137 gas	0%	🟰
openLong: min	1487 gas	1487 gas	0%	🟰
openLong: avg	50481 gas	50410 gas	0.1408%	🚨
openLong: max	184891 gas	184891 gas	0%	🟰
openShort: min	1608 gas	1608 gas	0%	🟰
openShort: avg	50099 gas	50078 gas	0.0419%	🚨
openShort: max	180398 gas	180398 gas	0%	🟰
redeemWithdrawalShares: min	1575 gas	1575 gas	0%	🟰
redeemWithdrawalShares: avg	19286 gas	19265 gas	0.1090%	🚨
redeemWithdrawalShares: max	57811 gas	57811 gas	0%	🟰
removeLiquidity: min	1639 gas	1639 gas	0%	🟰
removeLiquidity: avg	151310 gas	149669 gas	1.0964%	🚨
removeLiquidity: max	324287 gas	324379 gas	-0.0284%	✅

This comment was automatically generated by workflow using github-action-benchmark.

[coveralls]

coverage: 95.569% (+0.02%) from 95.552%
when pulling ec5b694 on jalextowle/chore/remove-pass
into 78dee14 on main.