rust: use bitcoin::bech32 re-export

diff --git a/src/rust/Cargo.lock b/src/rust/Cargo.lock
index e631847..f411213 100644
--- a/src/rust/Cargo.lock
+++ b/src/rust/Cargo.lock
@@ -122,7 +122,6 @@ dependencies = [
 name = "bitbox02-rust"
 version = "0.1.0"
 dependencies = [
- "bech32",
  "binascii",
  "bip32-ed25519",
  "bip39",
@@ -961,7 +960,6 @@ dependencies = [
 name = "streaming-silent-payments"
 version = "0.1.0"
 dependencies = [
- "bech32",
  "bitbox02",
  "bitcoin",
  "hex",
diff --git a/src/rust/Cargo.toml b/src/rust/Cargo.toml
index 6fb74c5..506b437 100644
--- a/src/rust/Cargo.toml
+++ b/src/rust/Cargo.toml
@@ -29,7 +29,6 @@ members = [
 resolver = "2"
 
 [workspace.dependencies]
-bech32 = { version = "0.11.0", default-features = false }
 # The secp-recovery feature is currently only needed in tests to make use of `RecoverableSignature`.
 # Attempting to enable it conditionally only for tests somehow leads to linking errors (duplicate secp256k1 symbols).
 bitcoin = { version = "0.32.7", default-features = false, features = ["secp-recovery"] }
diff --git a/src/rust/bitbox02-rust/Cargo.toml b/src/rust/bitbox02-rust/Cargo.toml
index 43a686d..2bcd079 100644
--- a/src/rust/bitbox02-rust/Cargo.toml
+++ b/src/rust/bitbox02-rust/Cargo.toml
@@ -43,7 +43,6 @@ num-bigint = { workspace = true, optional = true }
 num-traits = { version = "0.2", default-features = false }
 # If you change this, also change src/rust/.cargo/config.toml.
 bip32-ed25519 = { git = "https://github.com/BitBoxSwiss/rust-bip32-ed25519", tag = "v0.2.1", optional = true }
-bech32 = { workspace = true, optional = true }
 blake2 = { version = "0.10.6", default-features = false, optional = true }
 minicbor = { version = "0.24.0", default-features = false, features = ["alloc"], optional = true }
 crc = { version = "3.0.1", optional = true }
@@ -82,13 +81,11 @@ app-ethereum = [
 ]
 
 app-bitcoin = [
-  "dep:bech32",
   "dep:miniscript",
   "dep:streaming-silent-payments",
   "bitbox02/app-bitcoin",
 ]
 app-litecoin = [
-  "dep:bech32",
   "bitbox02/app-litecoin",
 ]
 
@@ -97,7 +94,6 @@ app-u2f = [
 ]
 
 app-cardano = [
-  "dep:bech32",
   "dep:blake2",
   "dep:minicbor",
   "dep:crc",
diff --git a/src/rust/bitbox02-rust/src/hww/api/bitcoin/common.rs b/src/rust/bitbox02-rust/src/hww/api/bitcoin/common.rs
index 4872407..0eaac71 100644
--- a/src/rust/bitbox02-rust/src/hww/api/bitcoin/common.rs
+++ b/src/rust/bitbox02-rust/src/hww/api/bitcoin/common.rs
@@ -29,6 +29,7 @@ use super::{multisig, params::Params, script};
 
 use sha2::{Digest, Sha256};
 
+use bitcoin::bech32;
 use bitcoin::hashes::Hash;
 
 const HASH160_LEN: usize = 20;
diff --git a/src/rust/bitbox02-rust/src/hww/api/cardano/address.rs b/src/rust/bitbox02-rust/src/hww/api/cardano/address.rs
index dbbc085..408e287 100644
--- a/src/rust/bitbox02-rust/src/hww/api/cardano/address.rs
+++ b/src/rust/bitbox02-rust/src/hww/api/cardano/address.rs
@@ -25,6 +25,8 @@ use pb::CardanoNetwork;
 use pb::cardano_response::Response;
 use pb::cardano_script_config::Config;
 
+use bitcoin::bech32;
+
 use blake2::{
     Blake2bVar,
     digest::{Update, VariableOutput},
diff --git a/src/rust/bitbox02-rust/src/hww/api/cardano/sign_transaction.rs b/src/rust/bitbox02-rust/src/hww/api/cardano/sign_transaction.rs
index 6ccacaa..2b5c571 100644
--- a/src/rust/bitbox02-rust/src/hww/api/cardano/sign_transaction.rs
+++ b/src/rust/bitbox02-rust/src/hww/api/cardano/sign_transaction.rs
@@ -21,6 +21,8 @@ use super::pb;
 use alloc::string::String;
 use alloc::vec::Vec;
 
+use bitcoin::bech32;
+
 use blake2::{
     Blake2bVar,
     digest::{Update, VariableOutput},
diff --git a/src/rust/streaming-silent-payments/Cargo.toml b/src/rust/streaming-silent-payments/Cargo.toml
index 4e2885e..6a8eaa8 100644
--- a/src/rust/streaming-silent-payments/Cargo.toml
+++ b/src/rust/streaming-silent-payments/Cargo.toml
@@ -21,7 +21,6 @@ license = "Apache-2.0"
 
 [dependencies]
 bitcoin = { workspace = true }
-bech32 = { workspace = true }
 bitbox02 = { path = "../bitbox02" }
 
 [dev-dependencies]
diff --git a/src/rust/streaming-silent-payments/src/lib.rs b/src/rust/streaming-silent-payments/src/lib.rs
index 2d921a8..33facf3 100644
--- a/src/rust/streaming-silent-payments/src/lib.rs
+++ b/src/rust/streaming-silent-payments/src/lib.rs
@@ -19,6 +19,7 @@ extern crate alloc;
 mod hash;
 
 pub use bitcoin;
+use bitcoin::bech32;
 use bitcoin::hashes::Hash;
 use bitcoin::secp256k1::{self, PublicKey, Scalar, Secp256k1, SecretKey, XOnlyPublicKey};