Postprocess for ijump astar: de-loop

[seveibar]

Remove useless loops in postprocessing like this, it should be easy to identify self-intersections and remove them from the output

[homie-gg]

Here are some pull requests that might be helpful reference for this task:

• Gridless Point of Interest Approach
• Infinite Grid Algorithms
• Orthogonal Intersection Optimal Hops (ijump enhancement)

[homie-gg]

This might have already been done via: Post-processing loop removal.

[homie-gg]

This might have already been done via: Update ijump algo, use multilayer autorouter.