remove unnecessary libraries

reebgraph/reebgraph.py

 import numpy as np
-import trimesh as tm
 import pyvista as pv
-import pymeshfix as pf
 import networkx as nx
 
 
@@ -167,11 +165,6 @@ if __name__ == '__main__':
 
     # load mesh
     mesh = pv.read('../horse.stl')
-    temp_mesh = pf.MeshFix(mesh)
-    temp_mesh = tm.base.Trimesh(vertices=temp_mesh.v, faces=temp_mesh.f)
-    tm.repair.fix_inversion(temp_mesh)
-    tm.repair.fix_winding(temp_mesh)
-    mesh2 = pv.wrap(temp_mesh)  # convert trimesh to pyvista
 
     # generate non-planar surfs
     bounds = mesh.bounds
@@ -193,7 +186,7 @@ if __name__ == '__main__':
     slices = []
     for layer_i, surf in enumerate(surfs):
         try:
-            sl = surf.clip_surface(mesh2, invert=True)
+            sl = surf.clip_surface(mesh, invert=True)
             slices.append(sl.clean(inplace=False))
             print("Slice", layer_i, "added. At Z", heights[layer_i], "of", heights[-1])
         except: