remove custom fastroute.tcl from n45/swerv_wrapper

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

Author: eder-matheus

flow/designs/nangate45/swerv_wrapper/config.mk

@@ -22,7 +22,5 @@ export MACRO_PLACE_HALO = 10 10
 export PLACE_DENSITY_LB_ADDON = 0.08
 export TNS_END_PERCENT        = 100
 
-#export FASTROUTE_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NAME)/fastroute.tcl
-
 export SWAP_ARITH_OPERATORS = 1
 export OPENROAD_HIERARCHICAL = 1