os/bluestore: remove unused functions

Signed-off-by: Pere Diaz Bou <[email protected]>

Author: pereman2

src/os/bluestore/BlueFS.h

@@ -602,9 +602,6 @@ class BlueFS {
   void _flush_bdev();  // this is safe to call without a lock
   void _flush_bdev(std::array<bool, MAX_BDEV>& dirty_bdevs);  // this is safe to call without a lock
 
-  int _preallocate(FileRef f, uint64_t off, uint64_t len);
-  int _truncate(FileWriter *h, uint64_t off);
-
   int64_t _read(
     FileReader *h,   ///< [in] read from here
     uint64_t offset, ///< [in] offset

src/os/bluestore/BlueStore.h

@@ -1403,9 +1403,6 @@ class BlueStore : public ObjectStore,
     void decode_omap_key(const std::string& key, std::string *user_key);
 
     void finish_write(TransContext* txc, uint32_t offset, uint32_t length);
-
-private:
-    void _decode(const ceph::buffer::list& v);
   };
 
   /// A generic Cache Shard