Revert "fix: override PDN_TCL for riscv32i-mock-sram to fix PDN-0232/0233"

This reverts commit 6d2bbc4.

Signed-off-by: Matt Liberty <[email protected]>

Author: maliberty

flow/designs/asap7/riscv32i-mock-sram/config.mk

@@ -1,11 +1,5 @@
 export DESIGN_NICKNAME = riscv32i-mock-sram
 export BLOCKS=fakeram7_256x32
 
-# Override platform default (BLOCKS_grid_strategy.tcl) which defines an
-# ElementGrid macro grid with no stripes, producing empty PDN grids
-# (PDN-0232/0233). BLOCK_grid_strategy.tcl uses M4-M5 connections that
-# match the block's MAX_ROUTING_LAYER=M4 constraint.
-export PDN_TCL = $(PLATFORM_DIR)/openRoad/pdn/BLOCK_grid_strategy.tcl
-
 include designs/asap7/riscv32i/config.mk