[flang] Remove needless include

Original-commit: flang-compiler/f18@5d2afd0ad37f82403c2445385aa76ab8b834ff36
Reviewed-on: https://github.com/flang-compiler/f18/pull/715

diff --git a/flang/lib/parser/provenance.h b/flang/lib/parser/provenance.h
index 064f703..0a785b8 100644 (file)
--- a/flang/lib/parser/provenance.h
+++ b/flang/lib/parser/provenance.h
@@ -22,7 +22,6 @@
 #include "../common/idioms.h"
 #include "../common/interval.h"
 #include <cstddef>
-#include <functional>
 #include <map>
 #include <memory>
 #include <optional>