Remove unused class

src/buffer-change-operation.coffee

@@ -1,69 +0,0 @@
-{Range} = require 'telepath'
-_ = require 'underscore'
-
-### Internal ###
-
-module.exports =
-class BufferChangeOperation
-  buffer: null
-  oldRange: null
-  oldText: null
-  newRange: null
-  newText: null
-  markersToRestoreOnUndo: null
-  markersToRestoreOnRedo: null
-
-  constructor: ({@buffer, @oldRange, @newText, @options}) ->
-    @options ?= {}
-
-  do: ->
-    @buffer.pauseEvents()
-    @pauseMarkerObservation()
-#     @markersToRestoreOnUndo = @invalidateMarkers(@oldRange)
-    if @oldRange?
-      @oldText = @buffer.getTextInRange(@oldRange)
-      @newRange = Range.fromText(@oldRange.start, @newText)
-      newRange = @changeBuffer
-        oldRange: @oldRange
-        newRange: @newRange
-        oldText: @oldText
-        newText: @newText
-#     @restoreMarkers(@markersToRestoreOnRedo) if @markersToRestoreOnRedo
-    @buffer.resumeEvents()
-    @resumeMarkerObservation()
-    newRange
-
-  undo: ->
-    @buffer.pauseEvents()
-    @pauseMarkerObservation()
-#     @markersToRestoreOnRedo = @invalidateMarkers(@newRange)
-    if @oldRange?
-      @changeBuffer
-        oldRange: @newRange
-        newRange: @oldRange
-        oldText: @newText
-        newText: @oldText
-#     @restoreMarkers(@markersToRestoreOnUndo)
-    @buffer.resumeEvents()
-    @resumeMarkerObservation()
-
-  changeBuffer: ({ oldRange, newRange, newText, oldText }) ->
-    @buffer.text.change(oldRange, newText)
-    newRange
-
-  invalidateMarkers: (oldRange) ->
-    @buffer.getMarkers().map (marker) -> marker.tryToInvalidate(oldRange)
-
-  pauseMarkerObservation: ->
-    marker.pauseEvents() for marker in @buffer.getMarkers(includeInvalid: true)
-
-  resumeMarkerObservation: ->
-    marker.resumeEvents() for marker in @buffer.getMarkers(includeInvalid: true)
-    @buffer.trigger 'markers-updated' if @oldRange?
-
-  restoreMarkers: (markersToRestore) ->
-    for [id, previousRange] in markersToRestore
-      if validMarker = @buffer.validMarkers[id]
-        validMarker.setRange(previousRange)
-      else if invalidMarker = @buffer.invalidMarkers[id]
-        invalidMarker.revalidate()