Editor: make sure to update marker on annotation change

Ensures an update for the markers editor widget after any of the
information displayed in the annotation has changed

Change-Id: I845e05f5103ee1615cfc3d7760cdfc2bbf510f32
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/clangcodemodel/clangdiagnosticmanager.cpp

@@ -392,7 +392,6 @@ void ClangDiagnosticManager::invalidateDiagnostics()
     for (ClangTextMark *textMark : m_clangTextMarks) {
         textMark->setColor(::Utils::Theme::Color::IconsDisabledColor);
         textMark->updateIcon(/*valid=*/ false);
-        textMark->updateMarker();
     }
 }