Removed obsolete stdin polling to cancel RX thread.
Removed obsolete stdin polling to cancel RX thread.

On early version, this function was polling on stdin. This allowed the
user to stop capturing by pressing a key when threading was not yet
implemented.
Now that user can create/cancel capture threads at will, this feature is
obsolote.

eroullit/dabba,eroullit/dabba,eroullit/dabba,eroullit/dabba