Remove unused re-exports of database types and related dead code (#6490)

ledger/src/blocktree.rs

@@ -37,13 +37,12 @@ use solana_sdk::clock::Slot;
 mod db;
 mod meta;
 
-pub use db::columns;
 use db::{columns as cf, Column, IteratorDirection, IteratorMode};
 use rocksdb::DBRawIterator;
 
-pub type Database = db::Database;
-pub type LedgerColumn<C> = db::LedgerColumn<C>;
-pub type WriteBatch = db::WriteBatch;
+type Database = db::Database;
+type LedgerColumn<C> = db::LedgerColumn<C>;
+type WriteBatch = db::WriteBatch;
 type BatchProcessor = db::BatchProcessor;
 
 pub const BLOCKTREE_DIRECTORY: &str = "rocksdb";

ledger/src/blocktree/db.rs

@@ -31,6 +31,7 @@ pub enum IteratorMode<Index> {
     From(Index, IteratorDirection),
 }
 
+#[allow(dead_code)]
 pub enum IteratorDirection {
     Forward,
     Reverse,
@@ -158,11 +159,6 @@ impl Rocks {
         Ok(())
     }
 
-    fn delete_cf(&self, cf: ColumnFamily, key: &[u8]) -> Result<()> {
-        self.0.delete_cf(cf, key)?;
-        Ok(())
-    }
-
     fn iterator_cf(
         &self,
         cf: ColumnFamily,
@@ -467,30 +463,6 @@ impl Database {
         Ok(())
     }
 
-    pub fn get_bytes<C>(&self, key: C::Index) -> Result<Option<Vec<u8>>>
-    where
-        C: Column,
-    {
-        self.backend
-            .get_cf(self.cf_handle::<C>(), C::key(key).borrow())
-    }
-
-    pub fn put_bytes<C>(&self, key: C::Index, data: &[u8]) -> Result<()>
-    where
-        C: Column,
-    {
-        self.backend
-            .put_cf(self.cf_handle::<C>(), C::key(key).borrow(), data)
-    }
-
-    pub fn delete<C>(&self, key: C::Index) -> Result<()>
-    where
-        C: Column,
-    {
-        self.backend
-            .delete_cf(self.cf_handle::<C>(), C::key(key).borrow())
-    }
-
     pub fn get<C>(&self, key: C::Index) -> Result<Option<C::Type>>
     where
         C: TypedColumn,
@@ -507,19 +479,6 @@ impl Database {
         }
     }
 
-    pub fn put<C>(&self, key: C::Index, value: &C::Type) -> Result<()>
-    where
-        C: TypedColumn,
-    {
-        let serialized_value = serialize(value)?;
-
-        self.backend.put_cf(
-            self.cf_handle::<C>(),
-            C::key(key).borrow(),
-            &serialized_value,
-        )
-    }
-
     pub fn iter<C>(
         &self,
         iterator_mode: IteratorMode<C::Index>,
@@ -673,6 +632,7 @@ where
         self.backend.cf_handle(C::NAME)
     }
 
+    #[cfg(test)]
     pub fn is_empty(&self) -> Result<bool> {
         let mut iter = self.backend.raw_iterator_cf(self.handle())?;
         iter.seek_to_first();
@@ -683,10 +643,6 @@ where
         self.backend
             .put_cf(self.handle(), C::key(key).borrow(), value)
     }
-
-    pub fn delete(&self, key: C::Index) -> Result<()> {
-        self.backend.delete_cf(self.handle(), C::key(key).borrow())
-    }
 }
 
 impl<C> LedgerColumn<C>