Remove vertex-edge-intersection check in FrontUpdate.h

The call to `vertex.intersects_mesh_edges()`, which checked if a
vertex is placed too close to its surrounding edges has been removed.
This check led to wrong element sizes when choosing quad layers with
very small heights (compared to the global element size).
It was also found that this check is not required to pass the
current meshing tests and thus has been removed.

src/algorithm/FrontUpdate.h

@@ -386,9 +386,6 @@ class FrontUpdate
     if ( v.intersects_facet(quads, range) )
     { DEBUG_LOG("  > QUAD INTERSECTION"); return false; }
 
-    if ( v.intersects_mesh_edges(mesh_, range, ve_intersection_ * rho) )
-    { DEBUG_LOG("  > EDGE INTERSECTION"); return false; }
-
     DEBUG_LOG("  > VALID");
     return true;
 
@@ -426,7 +423,6 @@ class FrontUpdate
 
   double          min_cell_quality_ = 0.0;
   double          max_cell_angle_   = M_PI;
-  double          ve_intersection_  = 0.01;
 
 }; // FrontUpdate