Revert "Introduced a token cache for the C++ editor."

This reverts commit c2393df023.

src/plugins/cpptools/cppmodelmanagerinterface.h

@@ -40,25 +40,16 @@
 
 namespace CPlusPlus {
     class LookupContext;
-    class TokenCache;
 }
 
 namespace ProjectExplorer {
     class Project;
 }
 
-namespace TextEditor {
-    class ITextEditor;
-}
-
 namespace CppTools {
 
 class AbstractEditorSupport;
 
-namespace Internal {
-class CppEditorSupport;
-}
-
 class CPPTOOLS_EXPORT CppModelManagerInterface : public QObject
 {
     Q_OBJECT
@@ -139,8 +130,6 @@ public:
 
     virtual void findMacroUsages(const CPlusPlus::Macro &macro) = 0;
 
-    virtual CPlusPlus::TokenCache *tokenCache(TextEditor::ITextEditor *editor) const = 0;
-
 Q_SIGNALS:
     void documentUpdated(CPlusPlus::Document::Ptr doc);