Remove concat expression

Signed-off-by: Nicholas Gates <[email protected]>

Author: gatesn

vortex-expr/src/exprs/concat.rs

@@ -4,7 +4,6 @@
 pub(crate) mod between;
 pub(crate) mod binary;
 pub(crate) mod cast;
-pub(crate) mod concat;
 pub mod dynamic;
 pub(crate) mod get_item;
 pub(crate) mod is_null;