Remove some redundant code from draw_synthesisable_wait
Remove some redundant code from draw_synthesisable_wait

The default draw_wait now produces code for FFs with sync
waits that should synthesise OK.

CastMi/iverilog,themperek/iverilog,CastMi/iverilog,themperek/iverilog,CastMi/iverilog,themperek/iverilog