Remove it expansion (#2701)

* Remove it-expansion, take 2

* Cleanup

* silly update to test CI

crates/nu-cli/tests/commands/math/avg.rs

@@ -8,7 +8,6 @@ fn can_average_numbers() {
              open sgml_description.json
              | get glossary.GlossDiv.GlossList.GlossEntry.Sections
              | math avg
-             | echo $it
          "#
     ));
 
@@ -19,7 +18,7 @@ fn can_average_numbers() {
 fn can_average_bytes() {
     let actual = nu!(
         cwd: "tests/fixtures/formats",
-        "ls | sort-by name | skip 1 | first 2 | get size | math avg | format \"{$it}\" | echo $it"
+        "ls | sort-by name | skip 1 | first 2 | get size | math avg | format \"{$it}\" "
     );
 
     assert_eq!(actual.out, "1.6 KB");

crates/nu-cli/tests/commands/math/median.rs

@@ -7,7 +7,6 @@ fn median_numbers_with_even_rows() {
         r#"
              echo [10 6 19 21 4]
              | math median
-             | echo $it
          "#
     ));
 
@@ -21,7 +20,6 @@ fn median_numbers_with_odd_rows() {
         r#"
              echo [3 8 9 12 12 15]
              | math median
-             | echo $it
          "#
     ));
 
@@ -35,7 +33,6 @@ fn median_mixed_numbers() {
         r#"
              echo [-11.5 -13.5 10]
              | math median
-             | echo $it
          "#
     ));
 

crates/nu-cli/tests/commands/math/mod.rs

@@ -209,18 +209,6 @@ fn duration_math_with_negative() {
     assert_eq!(actual.out, "-6day");
 }
 
-#[test]
-fn it_math() {
-    let actual = nu!(
-        cwd: "tests/fixtures/formats", pipeline(
-        r#"
-            echo 1020 | = $it + 10
-        "#
-    ));
-
-    assert_eq!(actual.out, "1030");
-}
-
 #[test]
 fn compound_comparison() {
     let actual = nu!(

crates/nu-cli/tests/commands/math/sum.rs

@@ -26,7 +26,6 @@ fn all() {
                 | get meals
                 | get calories
                 | math sum
-                | echo $it
             "#
         ));
 
@@ -36,7 +35,7 @@ fn all() {
 
 #[test]
 fn outputs_zero_with_no_input() {
-    let actual = nu!(cwd: ".", "math sum | echo $it");
+    let actual = nu!(cwd: ".", "math sum");
 
     assert_eq!(actual.out, "0");
 }