chore: use [lints] to address unexpected_cfgs lint (#7124)

.github/workflows/ci.yml

@@ -16,9 +16,9 @@ env:
   RUSTUP_WINDOWS_PATH_ADD_BIN: 1
   # Change to specific Rust release to pin
   rust_stable: stable
-  rust_nightly: nightly-2024-05-05
+  rust_nightly: nightly-2025-01-25
   # Pin a specific miri version
-  rust_miri_nightly: nightly-2024-10-21
+  rust_miri_nightly: nightly-2025-01-25
   rust_clippy: '1.77'
   # When updating this, also update:
   # - README.md
@@ -1086,23 +1086,6 @@ jobs:
         run: cargo check-external-types --all-features
         working-directory: tokio
 
-  check-unexpected-lints-cfgs:
-    name: check unexpected lints and cfgs
-    needs: basics
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Install Rust ${{ env.rust_nightly }}
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ env.rust_nightly }}
-      - name: don't allow warnings
-        run: sed -i '/#!\[allow(unknown_lints, unexpected_cfgs)\]/d' */src/lib.rs */tests/*.rs
-      - name: check for unknown lints and cfgs
-        run: cargo check --all-features --tests
-        env:
-          RUSTFLAGS: -Dwarnings --check-cfg=cfg(loom,tokio_unstable,tokio_taskdump,fuzzing,mio_unsupported_force_poll_poll,tokio_internal_mt_counters,fs,tokio_no_parking_lot,tokio_no_tuning_tests) -Funexpected_cfgs -Funknown_lints
-
   check-fuzzing:
     name: check-fuzzing
     needs: basics