test: remove exit tests

src/builtins/exit.rs

@@ -9,17 +9,4 @@ impl Builtin for Exit {
     }
 }
 
-/*#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_exit() {
-        assert_eq!(Exit.execute(vec!["arg".to_string()]), Err(ShellError::Exit))
-    }
-
-    #[test]
-    fn test_exit_without_args() {
-        assert_eq!(Exit.execute(vec![]), Err(ShellError::Exit))
-    }
-}*/
+// do not write tests for this. the call of exit 0 will abort all other tests too