RFR: JDK-8160829 - Remove ASMPool support from jlink

[Jim Laskey (Oracle)]

Much of the removed code seems unnecessary since the same functionality can be accomplished with much simpler code.  An example is provided with ClassForNamePlugin.java (temporary.)  A shipping byte code optimizer plugin will be supplied later.  Additional changes to the plugin API will supply a cross resource resolver that will make byte code optimizing code even simpler. 

http://cr.openjdk.java.net/~jlaskey/8160829/webrev/index.html
https://bugs.openjdk.java.net/browse/JDK-8160829