find-unneeded-includes: filter out boost/variant.hpp

As seen in include/sfx2/sidebar/Paint.hxx
this replacement is not needed

Change-Id: Idba8014a7effaec69c06891657cbd62546b7ac09
Reviewed-on: https://gerrit.libreoffice.org/70026
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

bin/find-unneeded-includes

@@ -82,6 +82,8 @@ def ignoreRemoval(include, toAdd, absFileName, moduleRules):
         return True
     if include == "boost/intrusive_ptr.hpp" and "boost/smart_ptr/intrusive_ptr.hpp" in toAdd:
         return True
+    if include == "boost/variant.hpp" and "boost/variant/variant.hpp" in toAdd:
+        return True
 
     # Avoid .hxx to .h proposals in basic css/uno/* API
     unoapi = {