Remove unused extern crate rustc_symbol_mangling

bjorn3 · bjorn3 · commit e6e46055df87 · 2021-12-31T16:57:33.000+01:00
diff --git a/src/lib.rs b/src/lib.rs
@@ -20,7 +20,6 @@ extern crate rustc_metadata;
 extern crate rustc_middle;
 extern crate rustc_session;
 extern crate rustc_span;
-extern crate rustc_symbol_mangling;
 extern crate rustc_target;
 
 // This prevents duplicating functions and statics that are already part of the host rustc process.
