Clear references to scrollbar components

src/scrollbar-component.coffee

@@ -12,6 +12,9 @@ class ScrollbarComponent
 
     @domNode.addEventListener 'scroll', @onScrollCallback
 
+  destroy: ->
+    @onScroll = null
+
   getDomNode: ->
     @domNode
 

src/text-editor-component.coffee

@@ -119,6 +119,14 @@ class TextEditorComponent
     @gutterContainerComponent?.destroy()
     @domElementPool.clear()
 
+    @verticalScrollbarComponent.destroy()
+    @horizontalScrollbarComponent.destroy()
+
+    @verticalScrollbarComponent = null
+    @horizontalScrollbarComponent = null
+    @onVerticalScroll = null
+    @onHorizontalScroll = null
+
   getDomNode: ->
     @domNode