[FAB-3246] Remove TODO from removeDataWrapper

The TODO in removeDataWrapper was from early development and
should be removed.  The empty byte array is the correct
return value.

Change-Id: Ifa0d7b53a7c464dacfa5fc37121f85a4b0d482c2
Signed-off-by: Chris Elder <chris.elder@us.ibm.com>

core/ledger/kvledger/txmgmt/statedb/statecouchdb/statecouchdb.go

@@ -136,7 +136,7 @@ func (vdb *VersionedDB) GetState(namespace string, key string) (*statedb.Version
 func removeDataWrapper(wrappedValue []byte, attachments []*couchdb.Attachment) ([]byte, version.Height) {
 
 	//initialize the return value
-	returnValue := []byte{} // TODO: empty byte or nil
+	returnValue := []byte{}
 
 	//initialize a default return version
 	returnVersion := version.NewHeight(0, 0)