Sample source plugins: removed useless init pure virtual method

plugins/samplesource/filesource/filesourceinput.cpp

@@ -140,11 +140,6 @@ void FileSourceInput::seekFileStream(int seekPercentage)
 	}
 }
 
-bool FileSourceInput::init(const Message& message)
-{
-	return false;
-}
-
 bool FileSourceInput::start(int device)
 {
 	QMutexLocker mutexLocker(&m_mutex);

plugins/samplesource/filesource/filesourceinput.h

@@ -212,7 +212,6 @@ public:
 	FileSourceInput(const QTimer& masterTimer);
 	virtual ~FileSourceInput();
 
-	virtual bool init(const Message& message);
 	virtual bool start(int device);
 	virtual void stop();
 

plugins/samplesource/filesource/filesourceplugin.cpp

@@ -25,7 +25,7 @@
 
 const PluginDescriptor FileSourcePlugin::m_pluginDescriptor = {
 	QString("File source input"),
-	QString("3.0.0"),
+	QString("3.4.0"),
 	QString("(c) Edouard Griffiths, F4EXB"),
 	QString("https://github.com/f4exb/sdrangel"),
 	true,