[core] fixed a critical bug

Author: tangxifan

vpr/src/tileable_rr_graph/rr_gsb.cpp

@@ -859,9 +859,6 @@ void RRGSB::sort_chan_node_in_edges(const RRGraphView& rr_graph) {
         SideManager side_manager(side);
         /* Bypass boundary GSBs here. When perimeter_cb option is on, Some GSBs may have only 1 side of CHANX or CHANY. There are no edges in the GSB, so we should skip them */
         chan_node_in_edges_[side].resize(chan_node_[side].get_chan_width());
-        if (chan_node_[side_manager.get_opposite()].get_chan_width() == 0) {
-            continue;
-        }
         for (size_t track_id = 0; track_id < chan_node_[side].get_chan_width(); ++track_id) {
             /* Only sort the output nodes and bypass passing wires */
             if ((OUT_PORT == chan_node_direction_[side][track_id])