Remove now unneeded OverlayVertexConsumerMixin

[Technici4n]

Mojang fixed this bug in https://bugs.mojang.com/browse/MC-193656. Detailed analysis of the fix:

• Before 24w05a: the bottom-most pose's normal matrix in the PoseStack used for rendering contains the mouse rotation, then later on the rotation is inversed using the inverse normal matrix given to RenderSystem.setInverseViewRotationMatrix.
• Starting from 24w05a: the mouse rotation does not appear in the normal matrix anymore.

The "numerical instability" is therefore gone from normal computations entirely, and we can remove this fix.

Tested that the original crumbling bug does not appear anymore when trying to break the octagonal column block from the FRAPI testmod.

Closes #3582.