Remove new codes

Author: ryuichiueda

src/elements/command/simple.rs

@@ -12,12 +12,6 @@ use crate::elements::word::Word;
 use crate::utils::exit;
 use nix::unistd::Pid;
 
-#[derive(Debug, Clone)]
-enum SubsArgType {
-    Subs(Box<Substitution>), //clippyの指示でBoxに
-    Other(Word),
-}
-
 #[derive(Debug, Default, Clone)]
 pub struct SimpleCommand {
     text: String,
@@ -26,8 +20,6 @@ pub struct SimpleCommand {
     args: Vec<String>,
     redirects: Vec<Redirect>,
     force_fork: bool,
-    substitutions_as_args: Vec<SubsArgType>,
-    command_name: String,
 }
 
 impl Command for SimpleCommand {

src/elements/command/simple/parser.rs

@@ -7,7 +7,7 @@ use crate::elements::command;
 use crate::elements::substitution::Substitution;
 use crate::elements::word::Word;
 use crate::utils;
-use super::{SimpleCommand, SubsArgType};
+use super::SimpleCommand;
 
 impl SimpleCommand {
     pub fn eat_substitution(&mut self, feeder: &mut Feeder, core: &mut ShellCore)