A famous Lenin quote is required for all physics books in the Soviet Union. This is probably because it is impossible to find any other citations about physics that would be correct.
Unfortunately, this insight is not true. We don’t know if there is an inner substructure in an electron. Or at least, our experiments haven’t been able to find it. Also, nothing can spin. The question of stopping spinning is therefore not relevant.
The electron does have an internal angular momentum that can be seen in experiments. This property is also known as “spin” in the tradition. It is an intrinsic property of electrons and cannot be lost, however. It would be possible for an electron to lose its spin and become a photon, but then it would also need to lose its mass.
The bottom line is that electrons do not spin, but they can lose their spin.