ci: Temporarily turn off warnings-as-errors for nightly CI jobs

The dead_code lint on nightly is currently incorrectly flagging a lot of structs
as unused.

Author: nicholasbishop

.github/workflows/rust.yml

@@ -123,6 +123,11 @@ jobs:
   build_feature_permutations:
     name: Build (feature permutations)
     runs-on: ubuntu-latest
+    env:
+      # TODO: temporarily allow warnings to not be errors on nightly due to
+      # incorrect dead_code lint.
+      # https://github.com/rust-osdev/uefi-rs/issues/1205
+      RUSTFLAGS: ""
     steps:
       - name: Checkout sources
         uses: actions/checkout@v4
@@ -134,6 +139,11 @@ jobs:
   nightly_channel:
     name: Build (nightly + unstable feature)
     runs-on: ubuntu-latest
+    env:
+      # TODO: temporarily allow warnings to not be errors on nightly due to
+      # incorrect dead_code lint.
+      # https://github.com/rust-osdev/uefi-rs/issues/1205
+      RUSTFLAGS: ""
     steps:
       - name: Checkout sources
         uses: actions/checkout@v4