remove deprecated APIs missed in #30182

src/libsyntax/ext/base.rs

@@ -601,13 +601,6 @@ impl<'a> ExtCtxt<'a> {
         }
     }
 
-    #[unstable(feature = "rustc_private", issue = "0")]
-    #[rustc_deprecated(since = "1.0.0",
-                 reason = "Replaced with `expander().fold_expr()`")]
-    pub fn expand_expr(&mut self, e: P<ast::Expr>) -> P<ast::Expr> {
-        self.expander().fold_expr(e)
-    }
-
     /// Returns a `Folder` for deeply expanding all macros in an AST node.
     pub fn expander<'b>(&'b mut self) -> expand::MacroExpander<'b, 'a> {
         expand::MacroExpander::new(self)