Organize imports of the new router

compiler/router/graph_node.py

@@ -3,7 +3,6 @@
 # Copyright (c) 2016-2023 Regents of the University of California, Santa Cruz
 # All rights reserved.
 #
-from openram.base.vector import vector
 from openram.base.vector3d import vector3d
 from openram.tech import drc
 

compiler/router/router.py

@@ -10,9 +10,9 @@ from openram.tech import GDS
 from openram.tech import drc
 from openram.tech import layer as tech_layer
 from openram import OPTS
-from .router_tech import router_tech
 from .graph_shape import graph_shape
 from .graph_utils import snap
+from .router_tech import router_tech
 
 
 class router(router_tech):

compiler/router/signal_escape_router.py

@@ -7,8 +7,8 @@ from openram import debug
 from openram.base.vector import vector
 from openram import OPTS
 from .graph import graph
-from .router import router
 from .graph_shape import graph_shape
+from .router import router
 
 
 class signal_escape_router(router):

compiler/router/supply_router.py

@@ -7,8 +7,8 @@ from openram import debug
 from openram.base.vector import vector
 from openram import OPTS
 from .graph import graph
-from .router import router
 from .graph_shape import graph_shape
+from .router import router
 
 
 class supply_router(router):