[processing] Fix duplicate output parameters for some algs

Fixes #18490

Author: nyalldawson

src/analysis/processing/qgsalgorithmfiledownloader.cpp

@@ -65,7 +65,6 @@ void QgsFileDownloaderAlgorithm::initAlgorithm( const QVariantMap & )
   addParameter( new QgsProcessingParameterString( QStringLiteral( "URL" ), tr( "URL" ), QVariant(), false, false ) );
   addParameter( new QgsProcessingParameterFileDestination( QStringLiteral( "OUTPUT" ),
                 tr( "File destination" ), QObject::tr( "All files (*.*)" ), QVariant(), true ) );
-  addOutput( new QgsProcessingOutputFile( QStringLiteral( "OUTPUT" ), tr( "File destination" ) ) );
 }
 
 QVariantMap QgsFileDownloaderAlgorithm::processAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )

src/analysis/processing/qgsalgorithmpackage.cpp

@@ -52,7 +52,6 @@ void QgsPackageAlgorithm::initAlgorithm( const QVariantMap & )
   addParameter( new QgsProcessingParameterMultipleLayers( QStringLiteral( "LAYERS" ), QObject::tr( "Input layers" ), QgsProcessing::TypeVector ) );
   addParameter( new QgsProcessingParameterFileDestination( QStringLiteral( "OUTPUT" ), QObject::tr( "Destination GeoPackage" ), QObject::tr( "GeoPackage files (*.gpkg)" ) ) );
   addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "OVERWRITE" ), QObject::tr( "Overwrite existing GeoPackage" ), false ) );
-  addOutput( new QgsProcessingOutputFile( QStringLiteral( "OUTPUT" ), QObject::tr( "GeoPackage" ) ) );
   addOutput( new QgsProcessingOutputMultipleLayers( QStringLiteral( "OUTPUT_LAYERS" ), QObject::tr( "Layers within new package" ) ) );
 }
 

src/analysis/processing/qgsalgorithmrasterlayeruniquevalues.cpp

@@ -53,8 +53,6 @@ void QgsRasterLayerUniqueValuesReportAlgorithm::initAlgorithm( const QVariantMap
   addParameter( new QgsProcessingParameterFileDestination( QStringLiteral( "OUTPUT_HTML_FILE" ),
                 QObject::tr( "Unique values report" ), QObject::tr( "HTML files (*.html)" ), QVariant(), true ) );
 
-  addOutput( new QgsProcessingOutputHtml( QStringLiteral( "OUTPUT_HTML_FILE" ), QObject::tr( "Unique values report" ) ) );
-
   addOutput( new QgsProcessingOutputString( QStringLiteral( "EXTENT" ), QObject::tr( "Extent" ) ) );
   addOutput( new QgsProcessingOutputString( QStringLiteral( "CRS_AUTHID" ), QObject::tr( "CRS authority identifier" ) ) );
   addOutput( new QgsProcessingOutputNumber( QStringLiteral( "WIDTH_IN_PIXELS" ), QObject::tr( "Width in pixels" ) ) );