Make BoxedUint::rem_vartime infallible using NonZero
#336
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Now that #335 has been merged allowing `NonZero<BoxedUint>` to be expressed, we can use it as the operand for remainder, eliminating the need to handle division by zero at the type system level. This dramatically simplifies the implementation of `BoxedResidueParams::new` since now all of the remainder calculations are infallible, and is more consistent with the other remainder functions.
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Now that #335 has been merged allowing
NonZero<BoxedUint>to be expressed, we can use it as the operand for remainder, eliminating the need to handle division by zero at the type system level.This dramatically simplifies the implementation of
BoxedResidueParams::newsince now all of the remainder calculations are infallible, and is more consistent with the other remainder functions.