remove useless schema

core/storage/src/schema.rs

@@ -4,19 +4,6 @@ use protocol::types::{Block, Bytes, DBBytes, Hash, Header, Proof, Receipt, Signe
 use crate::hash_key::{BlockKey, CommonHashKey};
 
 macro_rules! impl_storage_schema_for {
-    ($name: ident, $category: ident) => {
-        pub struct $name;
-
-        impl StorageSchema for $name {
-            type Key = DBBytes;
-            type Value = DBBytes;
-
-            fn category() -> StorageCategory {
-                StorageCategory::$category
-            }
-        }
-    };
-
     ($name: ident, $key: ty, $val: ty, $category: ident) => {
         pub struct $name;
 
@@ -54,8 +41,3 @@ impl_storage_schema_for!(LatestProofSchema, Hash, Proof, Block);
 impl_storage_schema_for!(OverlordWalSchema, Hash, Bytes, Wal);
 impl_storage_schema_for!(EvmCodeSchema, Hash, Bytes, Code);
 impl_storage_schema_for!(EvmCodeAddressSchema, Hash, Hash, Code);
-
-// The following schemas are used in state related MPT.
-impl_storage_schema_for!(EvmStateSchema, EvmState);
-impl_storage_schema_for!(MetadataStateSchema, MetadataState);
-impl_storage_schema_for!(CkbLightClientStateSchema, CkbLightClientState);