fix secret HW and clean a bit

src/shortint/enc_dec.rs

@@ -3,7 +3,7 @@ use itertools::Itertools;
 use crate::{
     bool::BoolEvaluator,
     random::{DefaultSecureRng, RandomFillUniformInModulus},
-    utils::{TryConvertFrom1, WithLocal},
+    utils::WithLocal,
     Decryptor, Encryptor, KeySwitchWithId, Matrix, MatrixEntity, MatrixMut, MultiPartyDecryptor,
     RowMut, SampleExtractor,
 };

src/shortint/mod.rs

@@ -205,16 +205,3 @@ mod frontend {
         }
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use itertools::Itertools;
-    use num_traits::Euclid;
-
-    use crate::{
-        bool::set_parameter_set, shortint::enc_dec::FheUint8, utils::WithLocal, Decryptor,
-        Encryptor, MultiPartyDecryptor,
-    };
-
-    use super::*;
-}