UploadPack: Remove duplicate sentReady assignment

This field was being set twice within the block.  Setting it just once
is sufficient.  writeString() does not examine the field so it is fine
to set it after the call.

Change-Id: Ib4c74df4f1304e9df3015885bf360bf0d7bc6ca2

org.eclipse.jgit/src/org/eclipse/jgit/transport/UploadPack.java

@@ -1142,7 +1142,6 @@ public class UploadPack {
 
 		if (multiAck == MultiAck.DETAILED && !didOkToGiveUp && okToGiveUp()) {
 			ObjectId id = peerHas.get(peerHas.size() - 1);
-			sentReady = true;
 			pckOut.writeString("ACK " + id.name() + " ready\n"); //$NON-NLS-1$ //$NON-NLS-2$
 			sentReady = true;
 		}