Revert "Define the CPUECTRL_EL1 register"

This reverts commit 7148851.

Author: vbe0201

src/registers.rs

@@ -23,7 +23,6 @@ mod cntvct_el0;
 mod cntvoff_el2;
 mod csselr_el1;
 mod cpacr_el1;
-mod cpuectrl_el1;
 mod dacr32_el2;
 mod currentel;
 mod daif;
@@ -84,7 +83,6 @@ pub use cntvct_el0::CNTVCT_EL0;
 pub use cntvoff_el2::CNTVOFF_EL2;
 pub use csselr_el1::CSSELR_EL1;
 pub use cpacr_el1::CPACR_EL1;
-pub use cpuectrl_el1::CPUECTRL_EL1;
 pub use dacr32_el2::DACR32_EL2;
 pub use currentel::CurrentEL;
 pub use daif::DAIF;