pkg/record: Record.Size is redundant with len(Data)

[dolmen]

From pkg/record/record.go:

sshproxy/pkg/record/record.go

Lines 48 to 55 in 7239859

	// A Record represents the data read from or written to a file descriptor.
	type Record struct {
	Time time.Time // received time
	Fd int // integer file descriptor
	Size int // size of data
	Data []byte // data
	}

Field r.Size is redundant with len(r.Data).

Removing the Size field will reduce memory allocated and could improve throughput. This could also eliminate any risk of mishandling Size vs Data (record.Encode, for example, doesn't do any consistency check).