[libcalamares] Reduce warnings (extra ;, empty statement ..)

src/libcalamares/locale/TimeZone.cpp

@@ -171,7 +171,6 @@ TZRegion::fromFile( const char* fileName )
         }
 
         QString region = timezoneParts.first().trimmed();
-        ;
         if ( region.isEmpty() )
         {
             continue;
@@ -243,7 +242,7 @@ CStringListModel::CStringListModel( CStringPairList l )
 CStringListModel::~CStringListModel() {}
 
 int
-CStringListModel::rowCount( const QModelIndex& parent ) const
+CStringListModel::rowCount( const QModelIndex& ) const
 {
     return m_list.count();
 }

src/libcalamares/locale/TimeZone.h

@@ -48,7 +48,7 @@ class CStringPair
 {
 public:
     /// @brief An empty pair
-    CStringPair() {};
+    CStringPair() {}
     /// @brief Given an identifier, create the pair
     explicit CStringPair( const char* s1 );
     CStringPair( CStringPair&& t );
@@ -88,7 +88,7 @@ class TZRegion : public CStringPair
 {
 public:
     using CStringPair::CStringPair;
-    virtual ~TZRegion();
+    virtual ~TZRegion() override;
     QString tr() const override;
 
     QString region() const { return key(); }