mock-array-big: remove cruft

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/designs/asap7/mock-array-big/ce_die_area.py

@@ -1,6 +1,4 @@
 import config
-
-margin_x = config.placement_grid_x * 8
-margin_y = config.placement_grid_y * 2
+import os
 
 print(f'0 0 {config.ce_width} {config.ce_height}')