Clean up older timed-read logic.

[wyld-sw]

With fb6.0a33, TREAD was re-coded as an in-server macro.

TREAD ( i -- s i )
  
  Acts like a timed READ call.  If the user does not provide input within
the given number of seconds, the READ call will time-out and return a
false boolean, otherwise it returns a true boolean and the string value
entered.  This is implemented as an in-server macro as follows:
    "__tread" timer_start { "TIMER.__tread" "READ" }list event_waitfor
    swap pop "READ" strcmp if "" 0 else read 1 "__tread" timer_stop then

The older logic was never removed. This PR does that.

It also removes "version" from docker-compose.yml since that is apparently deprecated.