moduleMain functions were never called but with nullptr; so simplify

src/effects/vamp/LoadVamp.cpp

@@ -38,7 +38,7 @@ DECLARE_MODULE_ENTRY(AudacityModule)
 {
    // Create and register the importer
    // Trust the module manager not to leak this
-   return safenew VampEffectsModule(path);
+   return safenew VampEffectsModule();
 }
 
 // ============================================================================
@@ -52,12 +52,8 @@ DECLARE_BUILTIN_MODULE(VampsEffectBuiltin);
 //
 ///////////////////////////////////////////////////////////////////////////////
 
-VampEffectsModule::VampEffectsModule(const wxString *path)
+VampEffectsModule::VampEffectsModule()
 {
-   if (path)
-   {
-      mPath = *path;
-   }
 }
 
 VampEffectsModule::~VampEffectsModule()
@@ -70,7 +66,7 @@ VampEffectsModule::~VampEffectsModule()
 
 PluginPath VampEffectsModule::GetPath()
 {
-   return mPath;
+   return {};
 }
 
 ComponentInterfaceSymbol VampEffectsModule::GetSymbol()

src/effects/vamp/LoadVamp.h

@@ -29,7 +29,7 @@
 class VampEffectsModule final : public ModuleInterface
 {
 public:
-   VampEffectsModule(const wxString *path);
+   VampEffectsModule();
    virtual ~VampEffectsModule();
 
    // ComponentInterface implementation
@@ -67,9 +67,6 @@ private:
    std::unique_ptr<Vamp::Plugin> FindPlugin(const PluginPath & wpath,
                             int & output,
                             bool & hasParameters);
-
-private:
-   PluginPath mPath;
 };
 
 #endif