Delete some dead code.

TODO

@@ -31,8 +31,6 @@ Impacts from Steves changes:
 - LazyParseByteCacheTest:
    - some redundant asserts
    - huge functions
-- Manipulator.java needs docs or to be removed
-- SpeedTest has a lot of unused fields, large functions. See if it can be simplified/densified. - or removed
 
 - Delete the code related to deduping. The new network management code to be checked in later makes it unnecessary.
   Also remove singleDigest as a result (it duplicates Sha256Hash).

tests/com/google/bitcoin/core/Manipulator.java

@@ -1,16 +0,0 @@
-package com.google.bitcoin.core;
-
-public abstract class Manipulator<M extends Message> {
-	
-	public abstract void manipulate(BitcoinSerializer bs, M message) throws Exception;
-	
-	public abstract void manipulate(BitcoinSerializer bs, byte[] bytes) throws Exception;
-	
-	public abstract String getDescription();
-	
-	public void beforeTest() {}
-	
-	public void afterTest() {}
-	
-	public long timeForR224Test() {return -1l;}
-}