Remove visualizer button on camera script from linux

com.unity.perception/Editor/GroundTruth/PerceptionCameraEditor.cs

                     GUIUtility.systemCopyBuffer = dir;
                 }
                 GUILayout.EndHorizontal();
+#if UNITY_EDITOR_WIN || UNITY_EDITOR_OSX
+#endif
                 GUILayout.EndVertical();
             }