FAB-10829 Remove unused java hash file/function

The java platform comment claims that the call to the hash computation
function affects the tar writer, but it does not in fact, and the hash
is discarded, so, this is all useless code. Removing.

Change-Id: Iad9c9bbbd4bdb7805f4d234db4091a1fad3448b2
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

Author: Jason Yellick

core/chaincode/platforms/java/hash.go

@@ -52,14 +52,6 @@ func (javaPlatform *Platform) GetDeploymentPayload(spec *pb.ChaincodeSpec) ([]by
 	gw := gzip.NewWriter(inputbuf)
 	tw := tar.NewWriter(gw)
 
-	//ignore the generated hash. Just use the tw
-	//The hash could be used in a future enhancement
-	//to check, warn of duplicate installs etc.
-	_, err = collectChaincodeFiles(spec, tw)
-	if err != nil {
-		return nil, err
-	}
-
 	err = writeChaincodePackage(spec, tw)
 
 	tw.Close()