chore: fix feature code usage

crates/katana/storage/provider/src/error.rs

@@ -4,8 +4,6 @@ use katana_primitives::class::ClassHash;
 use katana_primitives::contract::{ContractAddress, StorageKey};
 use katana_primitives::transaction::TxNumber;
 
-use crate::providers::fork::backend::ForkedBackendError;
-
 /// Possible errors returned by the storage provider.
 #[derive(Debug, thiserror::Error)]
 pub enum ProviderError {
@@ -108,7 +106,7 @@ pub enum ProviderError {
     /// [ForkedProvider](crate::providers::fork::ForkedProvider).
     #[cfg(feature = "fork")]
     #[error(transparent)]
-    ForkedBackend(#[from] ForkedBackendError),
+    ForkedBackend(#[from] crate::providers::fork::backend::ForkedBackendError),
 
     /// Any error that is not covered by the other variants.
     #[error("soemthing went wrong: {0}")]