Add Google Cloud Storage replica

replica.go

@@ -709,48 +709,6 @@ func (r *Replica) validator(ctx context.Context) {
 	}
 }
 
-// ReplicaClient represents client to connect to a Replica.
-type ReplicaClient interface {
-	// Returns the type of client.
-	Type() string
-
-	// Returns a list of available generations.
-	Generations(ctx context.Context) ([]string, error)
-
-	// Deletes all snapshots & WAL segments within a generation.
-	DeleteGeneration(ctx context.Context, generation string) error
-
-	// Returns an iterator of all snapshots within a generation on the replica.
-	Snapshots(ctx context.Context, generation string) (SnapshotIterator, error)
-
-	// Writes LZ4 compressed snapshot data to the replica at a given index
-	// within a generation. Returns metadata for the snapshot.
-	WriteSnapshot(ctx context.Context, generation string, index int, r io.Reader) (SnapshotInfo, error)
-
-	// Deletes a snapshot with the given generation & index.
-	DeleteSnapshot(ctx context.Context, generation string, index int) error
-
-	// Returns a reader that contains LZ4 compressed snapshot data for a
-	// given index within a generation. Returns an os.ErrNotFound error if
-	// the snapshot does not exist.
-	SnapshotReader(ctx context.Context, generation string, index int) (io.ReadCloser, error)
-
-	// Returns an iterator of all WAL segments within a generation on the replica.
-	WALSegments(ctx context.Context, generation string) (WALSegmentIterator, error)
-
-	// Writes an LZ4 compressed WAL segment at a given position.
-	// Returns metadata for the written segment.
-	WriteWALSegment(ctx context.Context, pos Pos, r io.Reader) (WALSegmentInfo, error)
-
-	// Deletes one or more WAL segments at the given positions.
-	DeleteWALSegments(ctx context.Context, a []Pos) error
-
-	// Returns a reader that contains an LZ4 compressed WAL segment at a given
-	// index/offset within a generation. Returns an os.ErrNotFound error if the
-	// WAL segment does not exist.
-	WALSegmentReader(ctx context.Context, pos Pos) (io.ReadCloser, error)
-}
-
 // Validate restores the most recent data from a replica and validates
 // that the resulting database matches the current database.
 func (r *Replica) Validate(ctx context.Context) error {