VST3 Host: Avoid rebuilding parameter tree in refreshParameterList

The VST3 spec disallows adding/removing parameters at runtime.
As far as I can tell, there's no way for a plugin to signal to the host
that the unitIds of one or more parameters have changed, so I suspect
these are not allowed to change at runtime either.

Given this, I can't think of a good reason for refreshParameterList to
have any effect for VST3 plug-ins.

modules/juce_audio_processors/format_types/juce_VST3PluginFormat.cpp

@@ -2386,7 +2386,7 @@ public:
 
         auto configureParameters = [this]
         {
-            refreshParameterList();
+            initialiseParameterList();
             synchroniseStates();
             syncProgramNames();
         };
@@ -3216,7 +3216,7 @@ private:
         }
     }
 
-    void refreshParameterList() override
+    void initialiseParameterList()
     {
         AudioProcessorParameterGroup newParameterTree;