Remove unused getEndCoords from range.coffee

This is not in upstream and it's not needed any more.

h/static/scripts/annotator/plugin/textselection.coffee

@@ -100,17 +100,6 @@ class Annotator.Plugin.TextSelection extends Annotator.Plugin
           type: "text range"
           range: r
 
-      # Do we have valid page coordinates inside the event
-      # which has triggered this function?
-      unless event.pageX
-        # No, we don't. Adding fake coordinates
-        pos = selectedRanges[0].getEndCoords()
-        event.pageX = pos.x
-        event.pageY = pos.y #- window.scrollY
-
       @annotator.onSuccessfulSelection event
     else
       @annotator.onFailedSelection event
-
-  # Strategies used for creating anchors from saved data
-

h/static/scripts/annotator/range.coffee

@@ -369,19 +369,6 @@ class Range.NormalizedRange
     range.setEndAfter(@end)
     range
 
-  # Utility function to bottom-right the coordinates of this range,
-  # by inserting a test element before it, and taking it's pos.
-  getEndCoords: ->
-    me = $ this.end  # Get the start element
-    probe = $ "<span></span>" # Prepare an element for probing
-    probe.insertAfter me # insert the probe element before the start
-    pos = probe.offset() # get the position
-    probe.remove()  # remove the probe, restoring the original state
-
-    # return the wanted data
-    x: pos.left
-    y: pos.top
-
 # Public: A range suitable for storing in local storage or serializing to JSON.
 class Range.SerializedRange