chore: remove nested duplicate trees (#76)

## Summary

This removes two tracked duplicate trees, each nested inside the
directory it copies: `verification/verification/` and
`www/.well-known/.well-known/`. The removal was first part of the
licence PR #74. It moved here so that #74 contains only the licence
change and stays under CodeRabbit's 100-file review limit.

The two PRs change no file in common, so they can merge in either order.

## Changes

- **Deleted `verification/verification/`** (28 files), a copy of
`verification/`.
- **Deleted `www/.well-known/.well-known/`** (3 files), a copy of
`www/.well-known/`.
- Nothing else changes.

30 of the 31 files match their outer copy line for line, apart from SPDX
and copyright lines. 15 of them carry the retired PMPL header. The 31st,
`verification/verification/README.adoc`, also has a title line, `=
Verification Pillar`. #74 adds that title and the copyright line to the
outer `verification/README.adoc`. If this PR merges first, the outer
README simply lacks the title until #74 lands; no content is lost.

## 📌 New pins

- **Head SHA: `31fd364ba67f7497c715599b47cbb518357c76bb`**
- None. No action `uses:`, `actions.lock`, lockfile or container digest
is added or changed.

## RSR Quality Checklist

### Required

- [ ] Tests pass: n/a. Only duplicate copies are deleted; no source,
proof or test that is built or run changes.
- [ ] Code is formatted: n/a, nothing is added.
- [x] Linter is clean: no file is added or edited.
- [x] No banned language patterns: nothing is added.
- [ ] No `unsafe` blocks: n/a, no Rust changed.
- [ ] No banned functions: n/a, no source or proofs added.
- [ ] SPDX license headers: n/a, the PR only deletes files.
- [x] No secrets or credentials.

### As Applicable

- [ ] `.machine_readable/*.a2ml` updated: no. A2ML is retired. 9 of the
deleted files are `.a2ml` duplicates
(`verification/verification/0.1-AI-MANIFEST.a2ml` and one
`0.2-AI-MANIFEST.a2ml` in each of its 8 subdirectories). Their outer
copies are unchanged.
- [ ] Documentation updated: n/a, no document refers to the deleted
paths except the signed historical record below.
- [ ] `TOPOLOGY.md`: n/a.
- [ ] `CHANGELOG`: not updated, since only duplicates are removed.
- [ ] New dependencies: none.
- [ ] ABI/FFI: n/a.

## Testing

- **Each deleted file was compared with its outer copy**, ignoring SPDX
lines, copyright lines and bare `<!--` / `-->` lines. Result: 30 files
have no difference. `verification/verification/README.adoc` differs only
by its title line, which is described above.
- Positive control: a copy of
`verification/verification/proofs/0.2-AI-MANIFEST.a2ml` with one planted
line reported 1 differing line.
- Limit: the comparison is line-based. It shows that the outer copy
keeps every non-licence line of the inner one. It says nothing about
which licence header is correct, which is #74's subject.
- **No dangling references:** `git grep -nE
'verification/verification|\.well-known/\.well-known' origin/main`
matches only `docs/AFFIRMATION.adoc:213-214`, the signed affirmation
that records this duplicate. It is left unchanged.
- **No overlap with #74:** `comm -12` of the two PRs' file lists is
empty.

## Red checks on this head

- `governance / Actions lockfile verify` is red on `main` (`589e1be`) as
well. It is fixed by #73 together with hyperpolymath/standards#1209, and
this PR does not touch it.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01GpUzjdhWFi26k6s7AWxYcf

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: hyperpolymath