refactor!: Remove unused snippets

Author: jan-ferdinand

tasm-lib/src/arithmetic/u64.rs

@@ -3,7 +3,6 @@ pub mod and;
 pub mod decr;
 pub mod div2;
 pub mod div_mod;
-pub mod double_pow2;
 pub mod eq;
 pub mod incr;
 pub mod leading_zeros;

tasm-lib/src/arithmetic/u64/double_pow2.rs

@@ -1,5 +1,3 @@
-pub mod cube;
 pub mod mod_pow_u32_generic;
-pub mod square;
 pub mod to_the_fourth;
 pub mod to_the_power_of_power_of_2;