diff --git a/src/app/pane-container.coffee b/src/app/pane-container.coffee
deleted file mode 100644
index 9f729b3aa..000000000
--- a/src/app/pane-container.coffee
+++ /dev/null
@@ -1,122 +0,0 @@
-{View, $$} = require 'space-pen'
-
-class PaneContainer extends View
-  @content ->
-    @div id: 'panes'
-
-  getWindowState: ->
-    @childWindowStates()[0]
-
-  childWindowStates: ->
-    @children().toArray().map (element) ->
-      $(element).view().getWindowState()
-
-  setWindowState: (windowState) ->
-    @empty()
-    @appendChild(windowState)
-    @adjustSplitPanes()
-
-  appendChild: (state) ->
-    [type, args...] = windowState
-    switch type
-      when 'editor'
-        editor = new Editor(args...)
-        @parentView.paneAdded(editor)
-        @append(editor)
-      when 'row'
-        @append(new Row(this, args))
-      when 'column'
-        @append(new Column(this, args))
-
-  addPaneLeft: (view, sibling) ->
-    @addPane(view, sibling, Row, 'before')
-
-  addPaneRight: (view, sibling) ->
-    @addPane(view, sibling, Row, 'after')
-
-  addPaneAbove: (view, sibling) ->
-    @addPane(view, sibling, Column, 'before')
-
-  addPaneBelow: (view, sibling) ->
-    @addPane(view, sibling, Column, 'after')
-
-  addPane: (view, sibling, axisClass, side) ->
-    unless sibling.parent().hasClass(axis)
-      container = new axisClass(this)
-      container.insertBefore(sibling).append(sibling.detach())
-    sibling[side](view)
-    @adjustSplitPanes()
-    view
-
-  adjustSplitPanes: ->
-    if @hasClass('row')
-      totalUnits = @horizontalGridUnits(element)
-      unitsSoFar = 0
-      for child in element.children()
-        child = $(child)
-        childUnits = @horizontalGridUnits(child)
-        child.css
-          width: "#{childUnits / totalUnits * 100}%"
-          height: '100%'
-          top: 0
-          left: "#{unitsSoFar / totalUnits * 100}%"
-        @adjustSplitPanes(child)
-        unitsSoFar += childUnits
-
-    else if element.hasClass('column')
-      totalUnits = @verticalGridUnits(element)
-      unitsSoFar = 0
-      for child in element.children()
-        child = $(child)
-        childUnits = @verticalGridUnits(child)
-        child.css
-          width: '100%'
-          height: "#{childUnits / totalUnits * 100}%"
-          top: "#{unitsSoFar / totalUnits * 100}%"
-          left: 0
-        @adjustSplitPanes(child)
-        unitsSoFar += childUnits
-######
-
-  horizontalGridUnits: (element) ->
-    if element.is('.row, .column')
-      childUnits = (@horizontalGridUnits($(child)) for child in element.children())
-      if element.hasClass('row')
-        _.sum(childUnits)
-      else # it's a column
-        Math.max(childUnits...)
-    else
-      1
-
-  verticalGridUnits: (element) ->
-    if element.is('.row, .column')
-      childUnits = (@verticalGridUnits($(child)) for child in element.children())
-      if element.hasClass('column')
-        _.sum(childUnits)
-      else # it's a row
-        Math.max(childUnits...)
-    else
-      1
-
-class Row extends PaneContainer
-  @content ->
-    @div class: 'row'
-
-  initialize: (@parentView, children=[]) ->
-    @appendChild(child) for child in children
-
-  getWindowState: ->
-    ['row'].concat(@childWindowStates())
-
-class Column extends PaneContainer
-  @content ->
-    @div class: 'column'
-
-  initialize: (@parentView, children=[]) ->
-    @appendChild(child) for child in children
-
-  getWindowState: ->
-    ['column'].concat(@childWindowStates())
-
-
-module.exports = { Column, Row }