Merge pull request #311 from yig/patch-2

Update AABB.cpp

Former-commit-id: 7be7c5af5f61530d81892fdf9d35e9ec05b6611b

include/igl/AABB.cpp

@@ -10,7 +10,6 @@
 #include "barycenter.h"
 #include "barycentric_coordinates.h"
 #include "colon.h"
-#include "colon.h"
 #include "doublearea.h"
 #include "matlab_format.h"
 #include "point_simplex_squared_distance.h"