/teleport command no longer prevents teleporting to invalid coordinates

The bug

Whenever I put in a number for the y-axis over 4096, it lets me teleport there. The +-30 million x and z limit is gone as well.

Inadvertently requesting to teleport out of bound can cause the game to crash or the player to be continuously kicked.

To reproduce

Just run /tp @s 100000000 ~ 100000000 and the game will freeze.