AudioPluginDemo: removed deprecated input/outputChannel methods to avoid compiler warning.

examples/audio plugin demo/Source/PluginProcessor.h

@@ -50,12 +50,6 @@ public:
     //==============================================================================
     const String getName() const override                                       { return JucePlugin_Name; }
 
-    const String getInputChannelName (int channelIndex) const override          { return String (channelIndex + 1); }
-    const String getOutputChannelName (int channelIndex) const override         { return String (channelIndex + 1); }
-
-    bool isInputChannelStereoPair (int /*index*/) const override                { return true; }
-    bool isOutputChannelStereoPair (int /*index*/) const override               { return true; }
-
     bool acceptsMidi() const override                                           { return true; }
     bool producesMidi() const override                                          { return true; }