[vte] sixel: Remove unnecessary include

[Christian Persch <chpe src gnome org>]

commit 30d212ff45a801fbfe62ee5d23043df184d737ef
Author: Christian Persch <chpe src gnome org>
Date:   Fri Oct 23 18:00:02 2020 +0200

    sixel: Remove unnecessary include

 src/sixel-context.hh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/sixel-context.hh b/src/sixel-context.hh
index 23d43173..1754f8f5 100644
--- a/src/sixel-context.hh
+++ b/src/sixel-context.hh
@@ -17,7 +17,6 @@
 
 #pragma once
 
-#include <bit>
 #include <cstdint>
 #include <iterator>
 #include <utility>
@@ -42,6 +41,8 @@ enum class endian
     native = __BYTE_ORDER__
 };
 } // namespace std
+#else
+#include <bit>
 #endif
 
 namespace vte::sixel {