wip datetimeparts fixes

Signed-off-by: Joe Isaacs <[email protected]>

Author: joseph-isaacs

encodings/datetime-parts/src/compute/rules.rs

@@ -9,7 +9,6 @@ use vortex_array::arrays::ConstantVTable;
 use vortex_array::arrays::FilterArray;
 use vortex_array::arrays::FilterVTable;
 use vortex_array::matchers::Exact;
-use vortex_array::optimizer::ArrayOptimizer;
 use vortex_array::optimizer::rules::ArrayParentReduceRule;
 use vortex_array::optimizer::rules::ParentRuleSet;
 use vortex_error::VortexExpect;