feat[array]: dynamic expr

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

Author: joseph-isaacs

vortex-array/src/expr/exprs/dynamic.rs

@@ -31,7 +31,6 @@ use crate::expr::ChildName;
 use crate::expr::ExecutionArgs;
 use crate::expr::ExprId;
 use crate::expr::Expression;
-use crate::expr::Operator as ExprOperator;
 use crate::expr::StatsCatalog;
 use crate::expr::VTable;
 use crate::expr::VTableExt;