Remove support of old code attribute format

[Remi Forax]

Hi all,
currently hotspot supports parsing a code attribute format [1] that is not described by the JVM spec if the major version is 45 and the minor <= 2.

Obviously, none of the bytecode tools or other VMs support that format because it is not described in the JVMS (it predates Java),
so it can be used to create classes that can not be inspected but run on hotspot. 

Someone named Chris ask us (ASM) to support that format [2], the same guy also asks for the support in javap see [3].

I think it's better to not change the VM spec but fix hotspot.

Before logging a bug, i want to know what you guys are thinking about that.

regards,
Rémi

[1] http://hg.openjdk.java.net/jdk/jdk/file/f7df2861be47/src/hotspot/share/classfile/classFileParser.cpp#l2451
[2] https://gitlab.ow2.org/asm/asm/issues/317888
[3] https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8232598