Remove jQuery from keymap-extensions

src/keymap-extensions.coffee

@@ -2,7 +2,6 @@ fs = require 'fs-plus'
 path = require 'path'
 KeymapManager = require 'atom-keymap'
 CSON = require 'season'
-{jQuery} = require 'space-pen'
 Grim = require 'grim'
 
 bundledKeymaps = require('../package.json')?._atomKeymaps
@@ -61,9 +60,4 @@ KeymapManager::subscribeToFileReadFailure = ->
 
     atom.notifications.addError(message, {detail, dismissable: true})
 
-# This enables command handlers registered via jQuery to call
-# `.abortKeyBinding()` on the `jQuery.Event` object passed to the handler.
-jQuery.Event::abortKeyBinding = ->
-  @originalEvent?.abortKeyBinding?()
-
 module.exports = KeymapManager