Accidentally added inter_cluster_net_delay back, removed.

Author: yenjames

vpr/src/base/vpr_types.h

@@ -786,7 +786,6 @@ struct t_packer_opts {
     enum e_cluster_seed cluster_seed_type;
     float timing_gain_weight;
     float connection_gain_weight;
-    float inter_cluster_net_delay;
     float target_device_utilization;
     e_unrelated_clustering allow_unrelated_clustering;
     bool connection_driven;