remove ppl random script and do not call io constraints after floorplan

Signed-off-by: Eder Monteiro <[email protected]>

Author: eder-matheus

flow/scripts/io_placement_random.tcl

@@ -1,9 +1,6 @@
 if {[env_var_exists_and_non_empty FLOORPLAN_DEF]} {
     puts "Skipping IO placement as DEF file was used to initialize floorplan."
 } else {
-  if {[env_var_exists_and_non_empty IO_CONSTRAINTS]} {
-    source $::env(IO_CONSTRAINTS)
-  }
   set args [list -hor_layers $::env(IO_PLACER_H) \
            -ver_layers $::env(IO_PLACER_V) \
            {*}$::env(PLACE_PINS_ARGS)]