diff --git a/src/annotator/sidebar.coffee b/src/annotator/sidebar.coffee
index dc184ba5554..e72e7f61da3 100644
--- a/src/annotator/sidebar.coffee
+++ b/src/annotator/sidebar.coffee
@@ -69,8 +69,6 @@ module.exports = class Sidebar extends Host
   _setupSidebarEvents: ->
     annotationCounts(document.body, @crossframe)
 
-    @crossframe.on('show', => this.show())
-    @crossframe.on('hide', => this.hide())
     @crossframe.on(events.LOGIN_REQUESTED, =>
       if @onLoginRequest
         @onLoginRequest()
diff --git a/src/annotator/test/sidebar-test.coffee b/src/annotator/test/sidebar-test.coffee
index 272bd4d5865..32137f7201e 100644
--- a/src/annotator/test/sidebar-test.coffee
+++ b/src/annotator/test/sidebar-test.coffee
@@ -32,20 +32,6 @@ describe 'Sidebar', ->
     emitEvent = (event, args...) ->
       fn(args...) for [evt, fn] in fakeCrossFrame.on.args when event == evt
 
-    describe 'on "show" event', ->
-      it 'shows the frame', ->
-        target = sandbox.stub(Sidebar.prototype, 'show')
-        sidebar = createSidebar()
-        emitEvent('show')
-        assert.called(target)
-
-    describe 'on "hide" event', ->
-      it 'hides the frame', ->
-        target = sandbox.stub(Sidebar.prototype, 'hide')
-        sidebar = createSidebar()
-        emitEvent('hide')
-        assert.called(target)
-
     describe 'on LOGIN_REQUESTED event', ->
       it 'calls the onLoginRequest callback function if one was provided', ->
         onLoginRequest = sandbox.stub()
diff --git a/src/sidebar/app.js b/src/sidebar/app.js
index 9887428db20..34abf5b3bbb 100644
--- a/src/sidebar/app.js
+++ b/src/sidebar/app.js
@@ -192,7 +192,6 @@ module.exports = angular.module('h', [
   .service('formRespond', require('./form-respond'))
   .service('frameSync', require('./frame-sync').default)
   .service('groups', require('./groups'))
-  .service('host', require('./host'))
   .service('localStorage', require('./local-storage'))
   .service('permissions', require('./permissions'))
   .service('queryParser', require('./query-parser'))
diff --git a/src/sidebar/host.coffee b/src/sidebar/host.coffee
deleted file mode 100644
index ae29f418486..00000000000
--- a/src/sidebar/host.coffee
+++ /dev/null
@@ -1,31 +0,0 @@
-###*
-# @ngdoc service
-# @name host
-#
-# @description
-# The `host` service relays the instructions the sidebar needs to send
-# to the host document. (As opposed to all guests)
-# It uses the bridge service to talk to the host.
-###
-module.exports = [
-  '$window', 'bridge'
-  ($window,   bridge) ->
-    host =
-      showSidebar: -> callHost('show')
-      hideSidebar: -> callHost('hide')
-
-    # Sends a message to the host frame
-    callHost = (method) ->
-      for {channel, window} in bridge.links when window is $window.parent
-        channel.call(method)
-        break
-
-    channelListeners =
-      back: -> host.hideSidebar()
-      open: -> host.showSidebar()
-
-    for own channel, listener of channelListeners
-      bridge.on(channel, listener)
-
-    return host
-]
diff --git a/src/sidebar/test/host-test.coffee b/src/sidebar/test/host-test.coffee
deleted file mode 100644
index d92976506b1..00000000000
--- a/src/sidebar/test/host-test.coffee
+++ /dev/null
@@ -1,81 +0,0 @@
-{module, inject} = angular.mock
-
-describe 'host', ->
-  sandbox = null
-  host = null
-  createChannel = -> call: sandbox.stub()
-  fakeBridge = null
-  $digest = null
-  publish = null
-  PARENT_WINDOW = 'PARENT_WINDOW'
-  dumpListeners = null
-
-  before ->
-    angular.module('h', [])
-    .service('host', require('../host'))
-
-  beforeEach module('h')
-
-  beforeEach module ($provide) ->
-    sandbox = sinon.sandbox.create()
-    fakeWindow = parent: PARENT_WINDOW
-
-    listeners = {}
-
-    publish = (method, args...) ->
-      listeners[method](args...)
-
-    fakeBridge =
-      ls: listeners
-      on: sandbox.spy (method, fn) -> listeners[method] = fn
-      call: sandbox.stub()
-      onConnect: sandbox.stub()
-      links: [
-        {window: PARENT_WINDOW,    channel: createChannel()}
-        {window: 'ANOTHER_WINDOW', channel: createChannel()}
-        {window: 'THIRD_WINDOW',   channel: createChannel()}
-      ]
-
-    $provide.value 'bridge', fakeBridge
-    $provide.value '$window', fakeWindow
-
-    return
-
-  afterEach ->
-    sandbox.restore()
-
-  beforeEach inject ($rootScope, _host_) ->
-    host = _host_
-    $digest = sandbox.stub($rootScope, '$digest')
-
-  describe 'the public API', ->
-
-    describe 'showSidebar()', ->
-      it 'sends the "showFrame" message to the host only', ->
-        host.showSidebar()
-        assert.calledWith(fakeBridge.links[0].channel.call, 'show')
-        assert.notCalled(fakeBridge.links[1].channel.call)
-        assert.notCalled(fakeBridge.links[2].channel.call)
-
-    describe 'hideSidebar()', ->
-      it 'sends the "hideFrame" message to the host only', ->
-        host.hideSidebar()
-        assert.calledWith(fakeBridge.links[0].channel.call, 'hide')
-        assert.notCalled(fakeBridge.links[1].channel.call)
-        assert.notCalled(fakeBridge.links[2].channel.call)
-
-  describe 'reacting to the bridge', ->
-
-    describe 'on "back" event', ->
-
-      it 'triggers the hideSidebar() API', ->
-        sandbox.spy host, "hideSidebar"
-        publish 'back'
-        assert.called host.hideSidebar
-
-    describe 'on "open" event', ->
-
-      it 'triggers the showSidebar() API', ->
-        sandbox.spy host, "showSidebar"
-        publish 'open'
-        assert.called host.showSidebar