Remove unnecessary re-export of MacroKind.

Author: nnethercote

compiler/rustc_expand/src/base.rs

@@ -21,7 +21,7 @@ use rustc_session::config::CollapseMacroDebuginfo;
 use rustc_session::{parse::ParseSess, Limit, Session};
 use rustc_span::def_id::{CrateNum, DefId, LocalDefId};
 use rustc_span::edition::Edition;
-use rustc_span::hygiene::{AstPass, ExpnData, ExpnKind, LocalExpnId};
+use rustc_span::hygiene::{AstPass, ExpnData, ExpnKind, LocalExpnId, MacroKind};
 use rustc_span::source_map::SourceMap;
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
 use rustc_span::{FileName, Span, DUMMY_SP};
@@ -32,8 +32,6 @@ use std::path::{Path, PathBuf};
 use std::rc::Rc;
 use thin_vec::ThinVec;
 
-pub(crate) use rustc_span::hygiene::MacroKind;
-
 // When adding new variants, make sure to
 // adjust the `visit_*` / `flat_map_*` calls in `InvocationCollector`
 // to use `assign_id!`