Revert "create audio-specific part of the usb conversation"

Also revert "dissect as interface general descr for v1.00"

This reverts commit 7cd4e8930454b3afa8e73eacd62bafc6f029022b and commit
152c6b06f1bb8193b6d2682ae40c61a1d642b7c1 to fix the fuzz failures while we work
out a proper solution.

Ping-Bug:10386
Change-Id: I6302b95c103f17bb2b48d43f8fc06352587b9e95
Reviewed-on: https://code.wireshark.org/review/3662
Reviewed-by: Evan Huus <eapache@gmail.com>