[libcalamaresui] Remove under-used function

- there was one consumer of this function, and it was over-engineered
  for what was needed (removing a list of widgets). Just drop it.

src/libcalamaresui/utils/CalamaresUtilsGui.cpp

@@ -256,24 +256,4 @@ defaultIconSize()
     return QSize( w, w );
 }
 
-
-void
-clearLayout( QLayout* layout )
-{
-    while ( QLayoutItem* item = layout->takeAt( 0 ) )
-    {
-        if ( QWidget* widget = item->widget() )
-        {
-            widget->deleteLater();
-        }
-
-        if ( QLayout* childLayout = item->layout() )
-        {
-            clearLayout( childLayout );
-        }
-
-        delete item;
-    }
-}
-
 }  // namespace CalamaresUtils

src/libcalamaresui/utils/CalamaresUtilsGui.h

@@ -95,14 +95,6 @@ UIDLLEXPORT QPixmap createRoundedImage( const QPixmap& avatar, const QSize& size
  */
 UIDLLEXPORT void unmarginLayout( QLayout* layout );
 
-// TODO:3.3:This has only one consumer, move to LicensePage, make static
-/**
- * @brief clearLayout recursively walks the QLayout tree and deletes all the child
- * widgets and layouts.
- * @param layout the layout to clear.
- */
-UIDLLEXPORT void clearLayout( QLayout* layout );
-
 UIDLLEXPORT void setDefaultFontSize( int points );
 UIDLLEXPORT int defaultFontSize();  // in points
 UIDLLEXPORT int defaultFontHeight();  // in pixels, DPI-specific

src/modules/license/LicensePage.cpp

@@ -115,7 +115,11 @@ LicensePage::LicensePage( QWidget* parent )
 void
 LicensePage::setEntries( const QList< LicenseEntry >& entriesList )
 {
-    CalamaresUtils::clearLayout( ui->licenseEntriesLayout );
+    for ( QWidget* w : m_entries )
+    {
+        ui->licenseEntriesLayout->removeWidget( w );
+        w->deleteLater();
+    }
 
     m_allLicensesOptional = true;
 
@@ -128,7 +132,6 @@ LicensePage::setEntries( const QList< LicenseEntry >& entriesList )
         m_entries.append( w );
         m_allLicensesOptional &= !entry.isRequired();
     }
-    ui->licenseEntriesLayout->addSpacerItem( new QSpacerItem( 10, 10, QSizePolicy::Minimum, QSizePolicy::Expanding ) );
 
     ui->acceptCheckBox->setChecked( false );
     checkAcceptance( false );