Remove non existent bundle

config/webpack.config.js

@@ -40,7 +40,6 @@ var config = {
     graphs:               './graphs/graphs_bundle.js',
     group:                './group.js',
     groups:               './groups/index.js',
-    issuable:             './issuable/issuable_bundle.js',
     issue_show:           './issue_show/index.js',
     locale:               './locale/index.js',
     main:                 './main.js',

spec/javascripts/test_bundle.js

@@ -51,7 +51,6 @@ if (process.env.BABEL_ENV === 'coverage') {
     './environments/environments_bundle.js',
     './filtered_search/filtered_search_bundle.js',
     './graphs/graphs_bundle.js',
-    './issuable/issuable_bundle.js',
     './issuable/time_tracking/time_tracking_bundle.js',
     './main.js',
     './merge_conflicts/merge_conflicts_bundle.js',