Remove useless method in chunkManager interface (#396)

Signed-off-by: wayblink <[email protected]>

core/storage/types.go

@@ -11,43 +11,19 @@ type FileReader interface {
 }
 
 // ChunkManager is to manager chunks.
-// Include Read, Write, Remove chunks.
 type ChunkManager interface {
-	// RootPath returns current root path.
-	// Useless in backup tool
-	// RootPath() string
-
-	// Path returns path of @filePath.
-	Path(ctx context.Context, bucketName string, filePath string) (string, error)
-	// Size returns path of @filePath.
-	Size(ctx context.Context, bucketName string, filePath string) (int64, error)
 	// Write writes @content to @filePath.
 	Write(ctx context.Context, bucketName string, filePath string, content []byte) error
-	// MultiWrite writes multi @content to @filePath.
-	//MultiWrite(ctx context.Context, bucketName string, contents map[string][]byte) error
 	// Exist returns true if @filePath exists.
 	Exist(ctx context.Context, bucketName string, filePath string) (bool, error)
 	// Read reads @filePath and returns content.
 	Read(ctx context.Context, bucketName string, filePath string) ([]byte, error)
-	// Reader return a reader for @filePath
-	//Reader(ctx context.Context, bucketName string, filePath string) (FileReader, error)
-	// MultiRead reads @filePath and returns content.
-	//MultiRead(ctx context.Context, bucketName string, filePaths []string) ([][]byte, error)
+	// ListWithPrefix list all objects with same @prefix
 	ListWithPrefix(ctx context.Context, bucketName string, prefix string, recursive bool) ([]string, []int64, error)
-	// ReadWithPrefix reads files with same @prefix and returns contents.
-	//ReadWithPrefix(ctx context.Context, bucketName string, prefix string) ([]string, [][]byte, error)
-	// Not use
-	//Mmap(ctx context.Context, bucketName string, filePath string) (*mmap.ReaderAt, error)
-	// ReadAt reads @filePath by offset @off, content stored in @p, return @n as the number of bytes read.
-	// if all bytes are read, @err is io.EOF.
-	// return other error if read failed.
-	//ReadAt(ctx context.Context, bucketName string, filePath string, off int64, length int64) (p []byte, err error)
 	// Remove delete @filePath.
 	Remove(ctx context.Context, bucketName string, filePath string) error
-	// MultiRemove delete @filePaths.
-	//MultiRemove(ctx context.Context, bucketName string, filePaths []string) error
 	// RemoveWithPrefix remove files with same @prefix.
 	RemoveWithPrefix(ctx context.Context, bucketName string, prefix string) error
-	// Move move files from fromPath into toPath recursively
+	// Copy files from fromPath into toPath recursively
 	Copy(ctx context.Context, fromBucketName string, toBucketName string, fromPath string, toPath string) error
 }