Use default constructor, destructor

src/gui/powermanagement/powermanagement.cpp

@@ -50,10 +50,6 @@ PowerManagement::PowerManagement(QObject *parent)
 #endif
 }
 
-PowerManagement::~PowerManagement()
-{
-}
-
 void PowerManagement::setActivityState(const bool busy)
 {
     if (busy)

src/gui/powermanagement/powermanagement.h

@@ -47,7 +47,7 @@ class PowerManagement : public QObject
 
 public:
   PowerManagement(QObject *parent = nullptr);
-  virtual ~PowerManagement();
+  virtual ~PowerManagement() = default;
 
   void setActivityState(bool busy);
 

src/gui/powermanagement/powermanagement_x11.cpp

@@ -51,10 +51,6 @@ PowerManagementInhibitor::PowerManagementInhibitor(QObject *parent)
     m_useGSM = false;
 }
 
-PowerManagementInhibitor::~PowerManagementInhibitor()
-{
-}
-
 void PowerManagementInhibitor::requestIdle()
 {
     m_intendedState = Idle;

src/gui/powermanagement/powermanagement_x11.h

@@ -39,7 +39,7 @@ class PowerManagementInhibitor : public QObject
 
 public:
     PowerManagementInhibitor(QObject *parent = nullptr);
-    virtual ~PowerManagementInhibitor();
+    virtual ~PowerManagementInhibitor() = default;
 
     void requestIdle();
     void requestBusy();

src/gui/rss/htmlbrowser.cpp

@@ -54,10 +54,6 @@ HtmlBrowser::HtmlBrowser(QWidget *parent)
     connect(m_netManager, &QNetworkAccessManager::finished, this, &HtmlBrowser::resourceLoaded);
 }
 
-HtmlBrowser::~HtmlBrowser()
-{
-}
-
 QVariant HtmlBrowser::loadResource(int type, const QUrl &name)
 {
     if (type == QTextDocument::ImageResource)

src/gui/rss/htmlbrowser.h

@@ -42,7 +42,7 @@ class HtmlBrowser final : public QTextBrowser
 
 public:
     explicit HtmlBrowser(QWidget* parent = nullptr);
-    ~HtmlBrowser();
+    ~HtmlBrowser() = default;
 
     QVariant loadResource(int type, const QUrl &name) override;
 

src/gui/transferlistfilters/categoryfiltermodel.cpp

@@ -38,9 +38,7 @@
 class CategoryModelItem
 {
 public:
-    CategoryModelItem()
-    {
-    }
+    CategoryModelItem() = default;
 
     CategoryModelItem(CategoryModelItem *parent, QString categoryName, int torrentsCount = 0)
         : m_parent(nullptr)