Inline Printer's scan_pop method

Author: dtolnay

compiler/rustc_ast_pretty/src/pp.rs

@@ -347,10 +347,6 @@ impl Printer {
         }
     }
 
-    fn scan_pop(&mut self) -> usize {
-        self.scan_stack.pop_front().unwrap()
-    }
-
     fn scan_top(&self) -> usize {
         *self.scan_stack.front().unwrap()
     }
@@ -396,19 +392,19 @@ impl Printer {
             match self.buf[x].token {
                 Token::Begin(_) => {
                     if k > 0 {
-                        self.scan_pop();
+                        self.scan_stack.pop_front().unwrap();
                         self.buf[x].size += self.right_total;
                         self.check_stack(k - 1);
                     }
                 }
                 Token::End => {
                     // paper says + not =, but that makes no sense.
-                    self.scan_pop();
+                    self.scan_stack.pop_front().unwrap();
                     self.buf[x].size = 1;
                     self.check_stack(k + 1);
                 }
                 _ => {
-                    self.scan_pop();
+                    self.scan_stack.pop_front().unwrap();
                     self.buf[x].size += self.right_total;
                     if k > 0 {
                         self.check_stack(k);