That tree should have never been planted there in the first place. Wrong choice from whomever did it; 0 research was done.
Plain and simple: it needs to be removed.
1) Cutting off the leading shoot(s) to accomodate for the lines above will only stimulate a mass of new shoots beneath the cut which will compete with each other for dominance; aka replace the leading shoot that was cut. In other words, this is how the tree is genetically programmed to grow and there's nothing you can do about it. Hacking away at it every year will only worsten the problem and you'll end up with one manky looking, aesthetically butchered tree.
2) The tree already has two competing leaders that make up 2/3 of the height already. In time they will grow against each other and then outwards because there is no room to accomodate normal secondary growth. They won't fuse either. The bark in between might rot and eventually, given the right (ughh, wrong) circumstances, could tear away from each other and cause damage to anything/anyone in the vicinity, and you end up with needing it removed anyway.
So cut your losses and have it removed. The silver lining here is that you now can dream of a new and beautiful tree that won't cause issues down the line. (genera Acer, Amelanchier, Magnolia, Cercis, Hamamelis....have species which don't grow too big. Just do some research)