Removing unused function

Signed-off-by: AMZN-Phil <pconroy@amazon.com>

Code/Tools/ProjectManager/Source/DownloadController.cpp

@@ -46,11 +46,6 @@ namespace O3DE::ProjectManager
         }
     }
 
-    void DownloadController::Start()
-    {
-        
-    }
-
     void DownloadController::UpdateUIProgress(int progress)
     {
         m_lastProgress = progress;

Code/Tools/ProjectManager/Source/DownloadController.h

@@ -51,7 +51,6 @@ namespace O3DE::ProjectManager
             }
         }
     public slots:
-        void Start();
         void UpdateUIProgress(int progress);
         void HandleResults(const QString& result);
         void HandleCancel();

Code/Tools/ProjectManager/Source/GemCatalog/GemCatalogScreen.cpp

@@ -34,7 +34,6 @@ namespace O3DE::ProjectManager
         setLayout(vLayout);
 
         m_downloadController = new DownloadController();
-        m_downloadController->Start();
 
         m_headerWidget = new GemCatalogHeaderWidget(m_gemModel, m_proxModel, m_downloadController);
         vLayout->addWidget(m_headerWidget);