This PR removes BatchContainer::{reserve, copy_slice}, which were unused. They could plausibly be re-introduced, but the majority of implementations were no-ops. The only non-trivial instance was Vec<T>'s implementation of copy_slice, but you could get the same extend_from_slice behavior from its copy_range implementation.
This PR removes
BatchContainer::{reserve, copy_slice}, which were unused. They could plausibly be re-introduced, but the majority of implementations were no-ops. The only non-trivial instance wasVec<T>'s implementation ofcopy_slice, but you could get the sameextend_from_slicebehavior from itscopy_rangeimplementation.