Move sub-namespace typedefs to typedefs.js

Here too there is one problem case.

src/ol/interaction/modifyinteraction.js

@@ -82,16 +82,6 @@ ol.interaction.ModifyEvent = function(type, features, mapBrowserPointerEvent) {
 goog.inherits(ol.interaction.ModifyEvent, ol.events.Event);
 
 
-/**
- * @typedef {{depth: (Array.<number>|undefined),
- *            feature: ol.Feature,
- *            geometry: ol.geom.SimpleGeometry,
- *            index: (number|undefined),
- *            segment: Array.<ol.Extent>}}
- */
-ol.interaction.SegmentDataType;
-
-
 /**
  * @classdesc
  * Interaction for modifying feature geometries.