chore: remove obsolete/corrupted check-no-vlang.sh gate

[hyperpolymath]

What

Removes the estate's scripts/check-no-vlang.sh gate and the CI step that
invoked it.

Why

V (vlang.io) was banned from the estate years ago. check-no-vlang.sh was
written to enforce that ban. At some point a global search-and-replace ran
"V" -> "zig" across the file and it now bans Zig instead -- Zig is the
estate's primary systems/FFI language (Zig-first ABI/FFI doctrine), so this
script has been silently failing CI for any repo that legitimately touches
Zig, and is worthless as a V-lang check now that "V" no longer appears in it.

Evidence of the corruption (from the script's own comments before removal):

• check-no-vlang.sh — enforce "ziguage is banned in the estate". (i.e. "V
  language" got replaced with "ziguage")
• Estate rule: zig (vlang.io) is banned. (vlang.io is V's site, not Zig's)
• PATTERNS=( ... 'zig' 'zig' 'vlang' ... ) (a duplicated replacement)
• failure message: zig has been replaced by zig-unified-api-adapter.

V is long retired from the estate and this check is obsolete either way, so
rather than fix the corrupted pattern list, this PR deletes the script and
its CI step outright.

What changed

• git rm scripts/check-no-vlang.sh
• Removed the "No zig references" / "No V-lang references" step from the
  CI workflow that invoked it (job/workflow otherwise untouched).

No other files were modified.

🤖 Generated with Claude Code

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[gitar-bot]

Running post-merge workflows

CI failed: 1 test failure due to a markdown file in docs/ violating AsciiDoc policy, and 1 build failure from unallowlisted repository root entries.

Overview

Two separate CI checks failed: one enforcing the documentation format (AsciiDoc required under docs/) and another checking repository root shape allowlists. Total logs analyzed: 2.

Failures

Documentation Format Check Failed (confidence: high)

• Type: test
• Affected jobs: 90107048488
• Related to change: no
• Root cause: Found .md file docs/tech-debt-2026-05-26.md in docs/ which violates the repository policy requiring .adoc files unless explicitly allowlisted.
• Suggested fix: Convert docs/tech-debt-2026-05-26.md to .adoc, or add a justified entry to the ALLOWED list in scripts/check-no-md-in-docs.sh.

Root Shape Check Failed (confidence: high)

• Type: build
• Affected jobs: 90106896326
• Related to change: yes
• Root cause: Files and directories such as ARCHITECTURE.md, CODE_OF_CONDUCT.md, Containerfile, GOVERNANCE.md, LICENSES/, MAINTAINERS, and mise.toml exist in the repository root but are not present in the allowlist.
• Suggested fix: Add the unapproved root entries to .machine_readable/root-allow.txt with justified entries or move them into appropriate subdirectories.

Summary

• Change-related failures: 1 (Root shape check failure due to unallowlisted files in the repository root)
• Infrastructure/flaky failures: 0
• Recommended action: Address the root shape allowlist and convert or allowlist the newly added markdown file in docs/.

Code Review ✅ Approved

Removes the obsolete check-no-vlang.sh script and its corresponding CI step, resolving the corrupted validation gate that incorrectly banned Zig. No issues found.

Auto-approved: No blocking issues found.
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