Removed unused local vars. Slightly refactored code.

src/widgets/helper/NotebookTab.cpp

@@ -29,8 +29,6 @@ NotebookTab::NotebookTab(Notebook *notebook)
     , notebook_(notebook)
     , menu_(this)
 {
-    auto app = getApp();
-
     this->setAcceptDrops(true);
 
     this->positionChangedAnimation_.setEasingCurve(
@@ -527,8 +525,6 @@ void NotebookTab::dragEnterEvent(QDragEnterEvent *event)
 
 void NotebookTab::mouseMoveEvent(QMouseEvent *event)
 {
-    auto app = getApp();
-
     if (getSettings()->showTabCloseButton &&
         this->notebook_->getAllowUserTabManagement())  //
     {

src/widgets/settingspages/AdvancedPage.cpp

@@ -26,7 +26,6 @@ namespace chatterino {
 AdvancedPage::AdvancedPage()
     : SettingsPage("Advanced", ":/settings/advanced.svg")
 {
-    auto app = getApp();
     LayoutCreator<AdvancedPage> layoutCreator(this);
 
     auto tabs = layoutCreator.emplace<QTabWidget>();

src/widgets/settingspages/ExternalToolsPage.cpp

@@ -14,8 +14,6 @@ namespace chatterino {
 ExternalToolsPage::ExternalToolsPage()
     : SettingsPage("External tools", ":/settings/externaltools.svg")
 {
-    auto app = getApp();
-
     LayoutCreator<ExternalToolsPage> layoutCreator(this);
     auto layout = layoutCreator.setLayoutType<QVBoxLayout>();