Remove decodeRoot

Signed-off-by: Ethan Lowman <[email protected]>

client/client.go

@@ -672,19 +672,6 @@ func (c *Client) downloadMetaFromTimestamp(name string, m data.TimestampFileMeta
 	return b, nil
 }
 
-// decodeRoot decodes and verifies root metadata.
-//
-//lint:ignore U1000 unused
-func (c *Client) decodeRoot(b json.RawMessage) error {
-	root := &data.Root{}
-	if err := c.db.Unmarshal(b, root, "root", c.rootVer); err != nil {
-		return ErrDecodeFailed{"root.json", err}
-	}
-	c.rootVer = root.Version
-	c.consistentSnapshot = root.ConsistentSnapshot
-	return nil
-}
-
 // decodeSnapshot decodes and verifies snapshot metadata, and returns the new
 // root and targets file meta.
 func (c *Client) decodeSnapshot(b json.RawMessage) (data.SnapshotFiles, error) {