chore(ci): delete codeql.yml + 6 subsumed standalone governance workflows (#29)

Doomed-CI cleanup, multi-class:

(A) Delete `codeql.yml`: this workflow targets `language: rust`, but
    Linguist for this repo lists only Julia / Zig / Idris (no Rust)
    and `gh api search/code` returns 0 `*.rs` files. CodeQL therefore
    exits with "no source files" on every PR.

(C) Delete 6 standalone workflows whose logic is already exercised by
    `governance.yml` (which calls
    `hyperpolymath/standards/.github/workflows/governance-reusable.yml@main`).
    The standards governance-reusable.yml header explicitly documents
    the subsumption mapping:

      * `quality.yml`             — subsumed
      * `guix-nix-policy.yml`     — subsumed
      * `npm-bun-blocker.yml`     — subsumed
      * `ts-blocker.yml`          — subsumed
      * `security-policy.yml`     — subsumed
      * `rsr-antipattern.yml`     — subsumed

These were filed from a pre-subsumption (pre standards#168) template
and never swept. They drift independently of the reusable's
authoritative logic.

`governance.yml` remains in place and continues to enforce all of the
above.

Identified by an estate-wide doomed-CI audit on 2026-05-27
(Tracks A + C — CodeQL language mismatch + subsumed standalones).
Axiom.jl is one of the two highest-defect repos in the estate (paired
with `verisimdb-data`, deferred to the post-pilot sweep).

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath