Revert "[US225] Retro-compatibility with old virtual machines"

This reverts commit 5d96b0432e8c716c0c81bde6c5a67096d5d90a29.
Revert "[US225] Dummy SetClipboard"

This reverts commit 0ff5c0538c88b02be35b3531592bbd3fb9c1f341.
Revert "[US225] Bi-directionnal communication"

This reverts commit 76c18b5b713c20dae7dd2120157ddb4a8bd33dcd.
Revert "[US225] Persitant connection"

This reverts commit 0f236aa9afda2d8ed2b94c08e079092998ce353c.