fix: allow static-mut-refs and dead-code warnings in clippy

It looks like clippy has been updated and now it throws the following
errors:
"error: creating a shared reference to mutable static is discouraged"
"field `0` is never read"

The suggested changes do not work with the current Fedora rust
version.

Allowing the warning until we get the proper fix.

Signed-off-by: Miguel Martín <mmartinv@redhat.com>

.github/workflows/ci.yml

@@ -79,7 +79,8 @@ jobs:
         with:
           toolchain: stable
           components: clippy
-      - run: cargo clippy -- -D warnings -D clippy::panic -D clippy::todo
+      # TODO remove '-A static-mut-refs' and '-A dead-code' and fix the real problem
+      - run: cargo clippy -- -D warnings -A dead-code -A static-mut-refs -D clippy::panic -D clippy::todo
 
   build_and_test:
     runs-on: ubuntu-latest