Apexq: remove CPU voltage hacks

A couple of CAF updates were added;
https://github.com/TeamApexQ/android_kernel_samsung_d2/commit/81bc635e5a5cedd982603734ba17fff624a0df98
https://github.com/TeamApexQ/android_kernel_samsung_d2/commit/310c8a4ac6ea101f37bcea24b24a90e568bb887d

These commits together promise to apply a sensible delay when dealing with varying voltage requirements, such as onlining the second core, or altering frequencies. The hacks we are now removing were required to ensure that there was adequate voltage supplied to the CPU in order to avoid L1/TLB errors due to undervoltage.