Inline and remove State::print_item_type.

It has a single call site. The removal of the closure argument is a nice
touch.

Author: nnethercote

compiler/rustc_hir_pretty/src/lib.rs

@@ -553,24 +553,6 @@ impl<'a> State<'a> {
 self.word(";")
 }
 
-fnprint_item_type(
-&mutself,
-item:&hir::Item<'_>,
-generics:&hir::Generics<'_>,
-inner:implFn(&mutSelf),
-){
-self.head("type");
-self.print_ident(item.ident);
-self.print_generic_params(generics.params);
-self.end();// end the inner ibox
-
-self.print_where_clause(generics);
-self.space();
-inner(self);
-self.word(";");
-self.end();// end the outer ibox
-}
-
 fnprint_item(&mutself,item:&hir::Item<'_>){
 self.hardbreak_if_not_bol();
 self.maybe_print_comment(item.span.lo());
@@ -683,10 +665,17 @@ impl<'a> State<'a> {
 self.end()
 }
  hir::ItemKind::TyAlias(ty, generics) => {
-self.print_item_type(item, generics, |state| {
- state.word_space("=");
- state.print_type(ty);
-});
+self.head("type");
+self.print_ident(item.ident);
+self.print_generic_params(generics.params);
+self.end();// end the inner ibox
+
+self.print_where_clause(generics);
+self.space();
+self.word_space("=");
+self.print_type(ty);
+self.word(";");
+self.end();// end the outer ibox
 }
  hir::ItemKind::Enum(ref enum_definition, params) => {
 self.print_enum_def(enum_definition, params, item.ident.name, item.span);