Drop unused declaration

Change-Id: I17cd0d144b64fc6bfc8ce10f1de2db3ce4565ac3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128444
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/starmath/inc/edit.hxx b/starmath/inc/edit.hxx
index a5dee85..3c5d498 100644
--- a/starmath/inc/edit.hxx
+++ b/starmath/inc/edit.hxx
@@ -33,11 +33,6 @@ class SmCmdBoxWindow;
class CommandEvent;
class Timer;

namespace svtools
{
class ColorConfig;
}

void SmGetLeftSelectionPart(const ESelection& rSelection, sal_Int32& nPara, sal_uInt16& nPos);

class SmEditWindow;
diff --git a/starmath/inc/view.hxx b/starmath/inc/view.hxx
index a8e02ad..5ad4ac3 100644
--- a/starmath/inc/view.hxx
+++ b/starmath/inc/view.hxx
@@ -38,8 +38,6 @@ class SmGraphicAccessible;
class SmGraphicWidget;
class SmElementsDockingWindow;

namespace svtools { class ColorConfig; }

class SmGraphicWindow final : public InterimItemWindow
{
private: