add Send + Sync on all traits, remove elsewhere

bindings/python/src/decoders.rs

@@ -9,7 +9,7 @@ use tk::tokenizer::Result;
 
 #[pyclass(dict)]
 pub struct Decoder {
-    pub decoder: Container<dyn tk::tokenizer::Decoder + Sync>,
+    pub decoder: Container<dyn tk::tokenizer::Decoder>,
 }
 #[pymethods]
 impl Decoder {

bindings/python/src/models.rs

@@ -78,7 +78,7 @@ impl<'source> FromPyObject<'source> for EncodeInput {
 /// This class cannot be constructed directly. Please use one of the concrete models.
 #[pyclass]
 pub struct Model {
-    pub model: Container<dyn tk::tokenizer::Model + Sync>,
+    pub model: Container<dyn tk::tokenizer::Model>,
 }
 
 #[pymethods]

bindings/python/src/normalizers.rs

@@ -7,7 +7,7 @@ use pyo3::types::*;
 
 #[pyclass(dict)]
 pub struct Normalizer {
-    pub normalizer: Container<dyn tk::tokenizer::Normalizer + Sync>,
+    pub normalizer: Container<dyn tk::tokenizer::Normalizer>,
 }
 
 #[pyclass(extends=Normalizer)]

bindings/python/src/pre_tokenizers.rs

@@ -9,7 +9,7 @@ use tk::tokenizer::{Offsets, Result};
 
 #[pyclass(dict)]
 pub struct PreTokenizer {
-    pub pretok: Container<dyn tk::tokenizer::PreTokenizer + Sync>,
+    pub pretok: Container<dyn tk::tokenizer::PreTokenizer>,
 }
 #[pymethods]
 impl PreTokenizer {

bindings/python/src/processors.rs

@@ -6,7 +6,7 @@ use pyo3::types::*;
 
 #[pyclass(dict)]
 pub struct PostProcessor {
-    pub processor: Container<dyn tk::tokenizer::PostProcessor + Sync>,
+    pub processor: Container<dyn tk::tokenizer::PostProcessor>,
 }
 
 #[pymethods]