Remove unnecessary history is_some checks

src/reader/mod.rs

@@ -239,12 +239,7 @@ impl ReaderState {
         self.history_inx = i;
         let i: usize = i.unwrap();
         let line = h.get(h.len().saturating_sub(i+1));
-        if line.is_some() {
-            self.set_line(line.unwrap().to_string());
-        } else {
-            bell();
-            self.redraw();
-        }
+        self.set_line(line.unwrap().to_string());
     }
 
     fn saved_restore(&mut self) {
@@ -267,12 +262,7 @@ impl ReaderState {
         }
         let i = i.unwrap();
         let line = h.get(h.len().saturating_sub(i+1));
-        if line.is_some() {
-            self.set_line(line.unwrap().to_string());
-        } else {
-            bell();
-            self.redraw();
-        }
+        self.set_line(line.unwrap().to_string());
     }
 
     pub fn move_left(&mut self) {