diff --git a/src/widgets/Notebook.hpp b/src/widgets/Notebook.hpp
index 23888ae61..ac6c4dad7 100644
--- a/src/widgets/Notebook.hpp
+++ b/src/widgets/Notebook.hpp
@@ -2,7 +2,6 @@
 
 #include "widgets/BaseWidget.hpp"
 
-#include <ForwardDecl.hpp>
 #include <pajlada/signals/signal.hpp>
 #include <pajlada/signals/signalholder.hpp>
 #include <QList>
diff --git a/src/widgets/helper/NotebookTab.cpp b/src/widgets/helper/NotebookTab.cpp
index 251b64af2..1040ebe38 100644
--- a/src/widgets/helper/NotebookTab.cpp
+++ b/src/widgets/helper/NotebookTab.cpp
@@ -356,7 +356,6 @@ void NotebookTab::newHighlightSourceAdded(const ChannelView &channelViewSource)
 {
     auto channelViewProxy =
         HighlightSources::ChannelViewProxy{&channelViewSource};
-    auto sourceChannel = channelViewSource.underlyingChannel();
     this->removeHighlightedSource(channelViewProxy);
     this->removeNewMessageSource(channelViewProxy);
     this->updateHighlightStateDueSourcesChange();
@@ -581,10 +580,6 @@ void NotebookTab::updateHighlightState(HighlightState newHighlightStyle,
     auto channelViewProxy =
         HighlightSources::ChannelViewProxy{&channelViewSource};
 
-    // the unvisible tab should unhighlight other tabs iff
-    // the other tab's filters are more generic therefore
-    // the other tab's filter set is subset of the unvisible tab
-
     switch (newHighlightStyle)
     {
         case HighlightState::Highlighted: {