chore(nix): remove the self-hosted flake package

[AprilNEA]

Removes OpenLogi's self-hosted Nix flake package (flake.nix, flake.lock, nix/package.nix).

Why

OpenLogi is already packaged in nixpkgs (NixOS/nixpkgs#527640) and distributed via homebrew-cask, so the repo's own flake adds no distribution path those two don't already cover — while it carried a recurring maintenance cost.

The package's single cargoHash had to be re-bumped on every Cargo.lock change: a dependency bump, a gpui pin bump, and every release version bump. The version-bump case is not obvious, so to be precise about the mechanism: rustPlatform.fetchCargoVendor copies Cargo.lock into the vendored fixed-output derivation (pkgs/build-support/rust/fetch-cargo-vendor-util.py), and Cargo.lock embeds the version of all 10 local openlogi* workspace crates. A release rewrites those 10 lines → the vendored content changes → the recursive NAR cargoHash changes.

With no Nix CI guard in place, that churn left the flake silently broken on master: the committed hash is for the 0.4.0-era lock, but the tree is at 0.6.13.

Why not the alternatives

• chore(nix): bump cargo hash and version #162 (cargoDepsName = pname) does not fix the churn. cargoDepsName only sets the deps derivation's name, which changes its store path — not the recursive NAR output hash that cargoHash verifies. The vendored Cargo.lock (with the bumped local versions) is unchanged in scope, so a version bump still invalidates the hash. (Verified against the pinned nixpkgs rev 4df1b88: build-rust-package/default.nix wires cargoDepsName only to name; fetch-cargo-vendor.nix sets outputHashMode = "recursive".)
• ci: split out Nix CI; rename CI workflow to Rust CI #114 (fail-closed Nix CI) would catch the drift automatically, but doesn't remove the per-release hash maintenance. Dropping the flake removes the churn at the root.

Scope / safety

• Removes flake.nix, flake.lock, nix/package.nix only.
• The devenv dev shell (.envrc / devenv.nix / devenv.yaml) is independent of the flake and is unaffected — nix build was the flake's only output; use devenv provides the shell.
• No workflow, README, or doc references the flake (only a historical CHANGELOG entry, left intact).

Revives #133; supersedes #114 and #162.

[greptile-apps]

Greptile Summary

Removes the repo's self-hosted Nix flake (flake.nix, flake.lock, nix/package.nix) since OpenLogi is already distributed via nixpkgs and homebrew-cask, and the flake's cargoHash had drifted silently (pinned to v0.4.0 while the tree is at v0.6.13).

• flake.nix and flake.lock deleted — no CI steps, README sections, or doc pages reference them; only a historical CHANGELOG entry remains, intentionally left intact.
• nix/package.nix deleted — the stale Rust derivation is removed at the root, eliminating the per-release cargoHash re-bump burden.
• The devenv dev shell (devenv.nix, .envrc, devenv.yaml) is independent and unaffected.

Confidence Score: 5/5

Safe to merge — only deletes three files with no downstream references in CI, docs, or workflows.

All three deleted files are self-contained: no CI job invokes nix build, no README or doc page links to the flake, and the devenv dev shell is a completely separate mechanism that remains untouched. The committed cargoHash was already stale (v0.4.0 vs. the current v0.6.13 tree), so removing these files improves correctness rather than regressing it.

No files require special attention.

Important Files Changed

Filename	Overview
flake.nix	Deleted — flake entry point that exposed the nix build package; no remaining references in CI or docs.
flake.lock	Deleted — lock file pinning nixpkgs-unstable; no longer needed without the flake.
nix/package.nix	Deleted — Rust build derivation (stale at v0.4.0 cargoHash while tree is at v0.6.13); removing eliminates recurring hash churn.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[OpenLogi distribution] --> B[nixpkgs\nNixOS/nixpkgs#527640]
    A --> C[homebrew-cask]
    A -.->|removed by this PR| D["Repo flake\n(flake.nix / nix/package.nix)"]
    E[Dev shell] --> F["devenv.nix\n(.envrc / devenv.yaml)\nunaffected"]

    style D stroke-dasharray: 5 5,fill:#ffcccc
    style B fill:#ccffcc
    style C fill:#ccffcc

Loading

_{Reviews (1): Last reviewed commit: "chore(nix): remove the self-hosted flake..." | Re-trigger Greptile}