CppTools: Remove resetFilters from CppModelManager

Without object pool resetting filters does nothing
and therefore is not needed anymore.

Change-Id: Id5439d11b0ee2564d7573b95c0c922d7fd7da59e
Reviewed-by: hjk <hjk@qt.io>

src/plugins/cpptools/cppmodelmanager.cpp

@@ -355,8 +355,7 @@ template<class FilterClass>
 static void setFilter(std::unique_ptr<FilterClass> &filter,
                       std::unique_ptr<FilterClass> &&newFilter)
 {
-    if (!newFilter)
-        return;
+    QTC_ASSERT(newFilter, return;);
     filter = std::move(newFilter);
 }
 
@@ -433,16 +432,6 @@ CppModelManager *CppModelManager::instance()
     return m_instance;
 }
 
-void CppModelManager::resetFilters()
-{
-    setLocatorFilter();
-    setClassesFilter();
-    setIncludesFilter();
-    setFunctionsFilter();
-    setSymbolsFindFilter();
-    setCurrentDocumentFilter();
-}
-
 void CppModelManager::createCppModelManager(Internal::CppToolsPlugin *parent)
 {
     QTC_ASSERT(!m_instance, return;);
@@ -536,7 +525,6 @@ CppModelManager::CppModelManager()
 CppModelManager::~CppModelManager()
 {
     delete d->m_internalIndexingSupport;
-    resetFilters();
     delete d;
 }