tests: clean unused and fix deny

.github/workflows/audit.yml

@@ -0,0 +1,9 @@
+name: Audit
+
+on:
+  push:
+
+jobs:
+  audit:
+    uses: pimalaya/nix/.github/workflows/audit.yml@master
+    secrets: inherit

.github/workflows/fastmail-tests.yml

@@ -1,25 +0,0 @@
-name: Fastmail tests
-
-on:
-  push:
-    branches:
-      - v2
-
-jobs:
-  fastmail-tests:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - run: cargo test --no-default-features --features jmap,rustls-ring --test fastmail-jmap -- --ignored
-        env:
-          FASTMAIL_EMAIL: ${{ secrets.FASTMAIL_EMAIL }}
-          FASTMAIL_API_TOKEN: ${{ secrets.FASTMAIL_API_TOKEN }}
-      - run: cargo test --no-default-features --features imap,rustls-ring --test fastmail-imap -- --ignored
-        env:
-          FASTMAIL_EMAIL: ${{ secrets.FASTMAIL_EMAIL }}
-          FASTMAIL_APP_PASSWORD: ${{ secrets.FASTMAIL_APP_PASSWORD }}
-      - run: cargo test --no-default-features --features smtp,rustls-ring --test fastmail-smtp -- --ignored
-        env:
-          FASTMAIL_EMAIL: ${{ secrets.FASTMAIL_EMAIL }}
-          FASTMAIL_APP_PASSWORD: ${{ secrets.FASTMAIL_APP_PASSWORD }}

.github/workflows/releases.yml

@@ -6,7 +6,6 @@ on:
       - v*
     branches:
       - master
-      - v2
 
 jobs:
   release:
@@ -14,4 +13,4 @@ jobs:
     secrets: inherit
     with:
       project: himalaya
-      nixpkgs: staging-next
+      nixpkgs: nixos-25.11

.github/workflows/stalwart-tests.yml

@@ -1,18 +0,0 @@
-name: Stalwart tests
-
-on:
-  push:
-    branches:
-      - v2
-
-jobs:
-  stalwart-tests:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
-      - run: ./tests/stalwart.sh
-      - run: cargo test --no-default-features --features jmap,rustls-ring --test stalwart-jmap -- --ignored
-      - run: cargo test --no-default-features --features imap,rustls-ring --test stalwart-imap -- --ignored
-      - run: cargo test --no-default-features --features smtp,rustls-ring --test stalwart-smtp -- --ignored
-      - run: docker stop himalaya-tests