remove default verbose output flag

Former-commit-id: 50415b0f5cebe83571e6194975f97a0ead7e3822

include/igl/triangle/triangulate.cpp

@@ -54,7 +54,7 @@ IGL_INLINE void igl::triangle::triangulate(
   using namespace Eigen;
 
   // Prepare the flags
-  string full_flags = flags + "pzBV";
+  string full_flags = flags + "pzB";
 
   // Prepare the input struct
   triangulateio in;