-Werror=unused-but-set-variable

...after c184cd9848 "tdf#168594 tdf#119931 a11y
special chars: Use IconView for recent/favorites"

Change-Id: I79d63bc80548419b1170b2a2cd25a99f08341907
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/196528
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <stephan.bergmann@collabora.com>

sfx2/source/control/charmapcontainer.cxx

@@ -346,8 +346,7 @@ void SfxCharmapContainer::updateCharControl(weld::IconView& rIconView,
 {
     rIconView.clear();
 
-    int i = 0;
-    for (auto it = rChars.begin(); it != rChars.end(); ++it, i++)
+    for (auto it = rChars.begin(); it != rChars.end(); ++it)
     {
         const int nIndex = rIconView.n_children();
         const OUString* pNullIconName = nullptr;