Core/MMaps: Simplify d182e5f7e73e614185f4470429467befd6e03981 and handle PATHFIND_INCOMPLETE in ChaseMovementGenerator as "cannot reach the target"

# Conflicts:
#	src/server/game/Movement/MovementGenerators/ChaseMovementGenerator.cpp

src/server/game/Movement/PathGenerator.cpp

@@ -471,13 +471,6 @@ void PathGenerator::BuildPolyPath(G3D::Vector3 const& startPos, G3D::Vector3 con
     else
         _type = PATHFIND_INCOMPLETE;
 
-    if (_type & PATHFIND_INCOMPLETE && _sourceUnit->CanFly())
-    {
-        BuildShortcut();
-        _type = PathType(PATHFIND_NORMAL | PATHFIND_NOT_USING_PATH);
-        return;
-    }
-
     // generate the point-path out of our up-to-date poly-path
     BuildPointPath(startPoint, endPoint);
 }