Fossil: Aspectify settings

Change-Id: I090cf3c63cd705220abb09e5d58eef89e9b55147
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

plugins/fossil/fossilplugin.h

@@ -31,17 +31,10 @@
 #include <vcsbase/vcsbaseplugin.h>
 #include <coreplugin/icontext.h>
 
-namespace Core {
-class ActionContainer;
-class CommandLocator;
-} // namespace Core
-
 namespace Fossil {
 namespace Internal {
 
-class OptionsPage;
 class FossilClient;
-class FossilEditorWidget;
 
 class FossilPlugin final : public ExtensionSystem::IPlugin
 {