Revert "IComposerClient wrapper for VTS tests"

This reverts commit 634340d6a8e34c3688227b88ba8ccde341076b2b.

Reason for revert: No one is using it, I will make a cl with usage of the wrapper along side this and reupload it.

Change-Id: I3ff3427fc9e81d53fd47a082ab027441f5dc8a66
8 files changed