Remove it expansion (#2701)

* Remove it-expansion, take 2

* Cleanup

* silly update to test CI

crates/nu-cli/tests/commands/nth.rs

@@ -10,7 +10,6 @@ fn selects_a_row() {
                 | sort-by name
                 | nth 0
                 | get name
-                | echo $it
             "#
         ));
 
@@ -30,10 +29,9 @@ fn selects_many_rows() {
                 | get name
                 | nth 1 0
                 | count
-                | echo $it
             "#
         ));
 
         assert_eq!(actual.out, "2");
     });
-}
+}