Remove all pins placed check from global placement

Removed check for all pins placed before skipping global placement.

Author: shifengzhicheng

flow/scripts/global_place_skip_io.tcl

@@ -4,8 +4,6 @@ load_design 2_floorplan.odb 2_floorplan.sdc
 
 if { [env_var_exists_and_non_empty FLOORPLAN_DEF] } {
   puts "FLOORPLAN_DEF is set. Skipping global placement without IOs"
-} elseif { [all_pins_placed] } {
-  puts "All pins are placed. Skipping global placement without IOs"
 } else {
   log_cmd global_placement -skip_io -density [place_density_with_lb_addon] \
     -pad_left $::env(CELL_PAD_IN_SITES_GLOBAL_PLACEMENT) \