diff --git a/src/lib.rs b/src/lib.rs
index 898689933e6..6a5a9c4f742 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,7 +7,6 @@
 // N.B. these crates are loaded from the sysroot, so they need extern crate.
 extern crate rustc_ast;
 extern crate rustc_ast_pretty;
-extern crate rustc_builtin_macros;
 extern crate rustc_data_structures;
 extern crate rustc_errors;
 extern crate rustc_expand;
diff --git a/src/parse/macros/asm.rs b/src/parse/macros/asm.rs
deleted file mode 100644
index 58c8d21bd7a..00000000000
--- a/src/parse/macros/asm.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-use rustc_ast::ast;
-use rustc_builtin_macros::asm::{AsmArgs, parse_asm_args};
-
-use crate::rewrite::RewriteContext;
-
-#[allow(dead_code)]
-pub(crate) fn parse_asm(context: &RewriteContext<'_>, mac: &ast::MacCall) -> Option<AsmArgs> {
-    let ts = mac.args.tokens.clone();
-    let mut parser = super::build_parser(context, ts);
-    parse_asm_args(&mut parser, mac.span(), ast::AsmMacro::Asm).ok()
-}
diff --git a/src/parse/macros/mod.rs b/src/parse/macros/mod.rs
index 8a956faf03b..16313ce65f4 100644
--- a/src/parse/macros/mod.rs
+++ b/src/parse/macros/mod.rs
@@ -9,7 +9,6 @@ use rustc_span::symbol;
 use crate::macros::MacroArg;
 use crate::rewrite::RewriteContext;
 
-pub(crate) mod asm;
 pub(crate) mod cfg_if;
 pub(crate) mod cfg_match;
 pub(crate) mod lazy_static;