chore(core/rust): remove warnings in translations

core/embed/rust/src/translations/blob.rs

@@ -405,6 +405,7 @@ impl<'a> TranslationsHeader<'a> {
     }
 
     pub fn verify(&self) -> Result<(), Error> {
+        #[allow(unused_mut)]
         let mut result = self.verify_with_keys(&public_keys::PUBLIC_KEYS);
         #[cfg(feature = "debug")]
         if result.is_err() {

core/embed/rust/src/translations/mod.rs

@@ -6,7 +6,6 @@ mod obj;
 mod public_keys;
 mod translated_string;
 
-pub use blob::MAX_HEADER_LEN;
 pub use translated_string::TranslatedString as TR;
 pub const DEFAULT_LANGUAGE: &str = "en-US";