Iterate over dependent gems

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

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

@@ -494,15 +494,10 @@ namespace O3DE::ProjectManager
             // we need to deactivate all gems that depend on this one
             for (auto dependentModelIndex : dependentGems)
             {
-                DeactivateDependentGems(model, dependentModelIndex);
+                SetIsAdded(model, dependentModelIndex, false);
             }
 
         }
-        else
-        {
-            // Deactivate this gem
-            SetIsAdded(model, modelIndex, false);
-        }
     }
 
     void GemModel::SetDownloadStatus(QAbstractItemModel& model, const QModelIndex& modelIndex, GemInfo::DownloadStatus status)