remove the usb_trans_info parameter from dissect_usb_hid_get_report_descriptor()

Change-Id: If14357a02a60eff5fc7e50567c2c6bfc6ee3dcc6
Reviewed-on: https://code.wireshark.org/review/3732
Reviewed-by: Martin Kaiser <wireshark@kaiser.cx>
Tested-by: Martin Kaiser <wireshark@kaiser.cx>