[vte] sixel: Remove ununused tracking of palette modification

[Christian Persch <chpe src gnome org>]

commit f4b99a55962ef80cedd10243867d19f2024d0299
Author: Christian Persch <chpe src gnome org>
Date:   Sat Apr 3 16:07:50 2021 +0200

    sixel: Remove ununused tracking of palette modification

 src/sixel-context.hh | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/src/sixel-context.hh b/src/sixel-context.hh
index 75232eff..43a01d42 100644
--- a/src/sixel-context.hh
+++ b/src/sixel-context.hh
@@ -94,7 +94,6 @@ public:
 private:
 
         color_t m_colors[2 + k_num_colors];
-        bool m_palette_modified{false};
 
         color_index_t m_current_color{0};
 
@@ -304,7 +303,6 @@ private:
                   color_t color) noexcept
         {
                 m_colors[m_current_color = reg] = color;
-                m_palette_modified = true;
         }
 
         void