Refacotr env of keyboard && enter view

src/common.rs

@@ -712,16 +712,6 @@ pub fn make_fd_flutter(id: i32, entries: &Vec<FileEntry>, only_count: bool) -> S
     serde_json::to_string(&m).unwrap_or("".into())
 }
 
-pub fn get_keyboard_mode() -> String {
-    return std::env::var("KEYBOARD_MODE")
-        .unwrap_or(String::from("legacy"))
-        .to_lowercase();
-}
-
-pub fn save_keyboard_mode(value: String) {
-    std::env::set_var("KEYBOARD_MODE", value);
-}
-
 #[cfg(not(target_os = "linux"))]
 lazy_static::lazy_static! {
     pub static ref IS_X11: Mutex<bool> = Mutex::new(false);