diff --git a/contrib/poly2tri_patch.txt b/contrib/poly2tri_patch.txt
deleted file mode 100644
index e9cca4cec..000000000
--- a/contrib/poly2tri_patch.txt
+++ /dev/null
@@ -1,75 +0,0 @@
-diff -r 5de9623d6a50 poly2tri/common/shapes.h
---- a/poly2tri/common/shapes.h	Mon Aug 08 22:26:41 2011 -0400
-+++ b/poly2tri/common/shapes.h	Tue Jan 17 02:36:52 2012 +0100
-@@ -35,6 +35,7 @@
- 
- #include <vector>
- #include <cstddef>
-+#include <stdexcept>
- #include <assert.h>
- #include <cmath>
- 
-@@ -136,7 +137,9 @@
-         p = &p2;
-       } else if (p1.x == p2.x) {
-         // Repeat points
--        assert(false);
-+		  // ASSIMP_CHANGE (aramis_acg)
-+		  throw std::runtime_error("repeat points");
-+        //assert(false);
-       }
-     }
- 
-diff -r 5de9623d6a50 poly2tri/sweep/sweep.cc
---- a/poly2tri/sweep/sweep.cc	Mon Aug 08 22:26:41 2011 -0400
-+++ b/poly2tri/sweep/sweep.cc	Tue Jan 17 02:36:52 2012 +0100
-@@ -113,6 +113,8 @@
-   Point* p1 = triangle->PointCCW(point);
-   Orientation o1 = Orient2d(eq, *p1, ep);
-   if (o1 == COLLINEAR) {
-+	  // ASSIMP_CHANGE (aramis_acg)
-+	  throw std::runtime_error("EdgeEvent - collinear points not supported");
-     if( triangle->Contains(&eq, p1)) {
-       triangle->MarkConstrainedEdge(&eq, p1 );
-       // We are modifying the constraint maybe it would be better to 
-@@ -121,8 +123,8 @@
-       triangle = &triangle->NeighborAcross(point);
-       EdgeEvent( tcx, ep, *p1, triangle, *p1 );
-     } else {
-+	  // ASSIMP_CHANGE (aramis_acg)
-       std::runtime_error("EdgeEvent - collinear points not supported");
--      assert(0);
-     }
-     return;
-   }
-@@ -130,6 +132,9 @@
-   Point* p2 = triangle->PointCW(point);
-   Orientation o2 = Orient2d(eq, *p2, ep);
-   if (o2 == COLLINEAR) {
-+	  // ASSIMP_CHANGE (aramis_acg)
-+	  throw std::runtime_error("EdgeEvent - collinear points not supported");
-+
-     if( triangle->Contains(&eq, p2)) {
-       triangle->MarkConstrainedEdge(&eq, p2 );
-       // We are modifying the constraint maybe it would be better to 
-@@ -138,8 +143,8 @@
-       triangle = &triangle->NeighborAcross(point);
-       EdgeEvent( tcx, ep, *p2, triangle, *p2 );
-     } else {
--      std::runtime_error("EdgeEvent - collinear points not supported");
--      assert(0);
-+      // ASSIMP_CHANGE (aramis_acg)
-+      throw std::runtime_error("EdgeEvent - collinear points not supported");
-     }
-     return;
-   }
-@@ -712,7 +717,8 @@
-     return *ot.PointCW(op);
-   } else{
-     //throw new RuntimeException("[Unsupported] Opposing point on constrained edge");
--    assert(0);
-+	  // ASSIMP_CHANGE (aramis_acg)
-+	  throw std::runtime_error("[Unsupported] Opposing point on constrained edge");
-   }
- }
-