Rip it out

My type ascription
Oh rip it out
Ah
If you think we live too much then
You can sacrifice diagnostics
Don't mix your garbage
Into my syntax
So many weird hacks keep diagnostics alive
Yet I don't even step outside
So many bad diagnostics keep tyasc alive
Yet tyasc doesn't even bother to survive!

compiler/rustc_expand/src/base.rs

@@ -992,7 +992,6 @@ pub struct ExpansionData {
     pub depth: usize,
     pub module: Rc<ModuleData>,
     pub dir_ownership: DirOwnership,
-    pub prior_type_ascription: Option<(Span, bool)>,
     /// Some parent node that is close to this macro call
     pub lint_node_id: NodeId,
     pub is_trailing_mac: bool,
@@ -1043,7 +1042,6 @@ impl<'a> ExtCtxt<'a> {
                 depth: 0,
                 module: Default::default(),
                 dir_ownership: DirOwnership::Owned { relative: None },
-                prior_type_ascription: None,
                 lint_node_id: ast::CRATE_NODE_ID,
                 is_trailing_mac: false,
             },