[LyX/master] Remove unused parameter.

[Jean-Marc Lasgouttes]

commit f9e0d4a595bb568ca5f952e507d39487b05b8dd7
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date:   Fri May 16 15:25:17 2014 +0200

    Remove unused parameter.

diff --git a/src/insets/InsetSeparator.cpp b/src/insets/InsetSeparator.cpp
index 68b2fb8..ba98552 100644
--- a/src/insets/InsetSeparator.cpp
+++ b/src/insets/InsetSeparator.cpp
@@ -137,7 +137,7 @@ ColorCode InsetSeparator::ColorName() const
 }
 
 
-void InsetSeparator::latex(otexstream & os, OutputParams const & rp) const
+void InsetSeparator::latex(otexstream & os, OutputParams const &) const
 {
        switch (params_.kind) {
                case InsetSeparatorParams::PLAIN: