[libcalamaresui] Remove unused parameter/functionality

- nothing in Calamares uses the tinting, and it triggers some
  deprecation warnings, so just remove it.

src/libcalamaresui/utils/ImageRegistry.cpp

@@ -34,9 +34,9 @@ ImageRegistry::icon( const QString& image, CalamaresUtils::ImageMode mode )
 
 
 qint64
-ImageRegistry::cacheKey( const QSize& size, qreal opacity, QColor tint )
+ImageRegistry::cacheKey( const QSize& size, qreal opacity )
 {
-    return size.width() * 100 + size.height() * 10 + static_cast< qint64 >( opacity * 100.0 ) + tint.value();
+    return size.width() * 100 + size.height() * 10 + static_cast< qint64 >( opacity * 100.0 );
 }
 
 
@@ -44,8 +44,7 @@ QPixmap
 ImageRegistry::pixmap( const QString& image,
                        const QSize& size,
                        CalamaresUtils::ImageMode mode,
-                       qreal opacity,
-                       QColor tint )
+                       qreal opacity )
 {
     Q_ASSERT( !( size.width() < 0 || size.height() < 0 ) );
     if ( size.width() < 0 || size.height() < 0 )
@@ -64,7 +63,7 @@ ImageRegistry::pixmap( const QString& image,
         {
             subsubcache = subcache.value( mode );
 
-            const qint64 ck = cacheKey( size, opacity, tint );
+            const qint64 ck = cacheKey( size, opacity );
             if ( subsubcache.contains( ck ) )
             {
                 return subsubcache.value( ck );
@@ -85,19 +84,6 @@ ImageRegistry::pixmap( const QString& image,
         svgRenderer.render( &pixPainter );
         pixPainter.end();
 
-        if ( tint.alpha() > 0 )
-        {
-            QImage resultImage( p.size(), QImage::Format_ARGB32_Premultiplied );
-            QPainter painter( &resultImage );
-            painter.drawPixmap( 0, 0, p );
-            painter.setCompositionMode( QPainter::CompositionMode_Screen );
-            painter.fillRect( resultImage.rect(), tint );
-            painter.end();
-
-            resultImage.setAlphaChannel( p.toImage().alphaChannel() );
-            p = QPixmap::fromImage( resultImage );
-        }
-
         pixmap = p;
     }
     else
@@ -128,7 +114,7 @@ ImageRegistry::pixmap( const QString& image,
             }
         }
 
-        putInCache( image, size, mode, opacity, pixmap, tint );
+        putInCache( image, size, mode, opacity, pixmap );
     }
 
     return pixmap;
@@ -140,8 +126,7 @@ ImageRegistry::putInCache( const QString& image,
                            const QSize& size,
                            CalamaresUtils::ImageMode mode,
                            qreal opacity,
-                           const QPixmap& pixmap,
-                           QColor tint )
+                           const QPixmap& pixmap )
 {
     QHash< qint64, QPixmap > subsubcache;
     QHash< int, QHash< qint64, QPixmap > > subcache;
@@ -155,7 +140,7 @@ ImageRegistry::putInCache( const QString& image,
         }
     }
 
-    subsubcache.insert( cacheKey( size, opacity, tint ), pixmap );
+    subsubcache.insert( cacheKey( size, opacity ), pixmap );
     subcache.insert( mode, subsubcache );
     s_cache.insert( image, subcache );
 }

src/libcalamaresui/utils/ImageRegistry.h

@@ -25,17 +25,15 @@ public:
     QPixmap pixmap( const QString& image,
                     const QSize& size,
                     CalamaresUtils::ImageMode mode = CalamaresUtils::Original,
-                    qreal opacity = 1.0,
-                    QColor tint = QColor( 0, 0, 0, 0 ) );
+                    qreal opacity = 1.0 );
 
 private:
-    qint64 cacheKey( const QSize& size, qreal opacity, QColor tint );
+    qint64 cacheKey( const QSize& size, qreal opacity );
     void putInCache( const QString& image,
                      const QSize& size,
                      CalamaresUtils::ImageMode mode,
                      qreal opacity,
-                     const QPixmap& pixmap,
-                     QColor tint );
+                     const QPixmap& pixmap );
 };
 
 #endif  // IMAGE_REGISTRY_H