fix karma

spec/javascripts/boards/components/assignee_select_spec.js

@@ -2,13 +2,12 @@
 /* global boardObj */
 /* global BoardService */
 /* global mockBoardService */
-/* global IssuableContext */
 
 import Vue from 'vue';
 import AssigneeSelect from '~/boards/components/assignee_select.vue';
 import '~/boards/services/board_service';
 import '~/boards/stores/boards_store';
-import '~/issuable_context';
+import IssuableContext from '~/issuable_context';
 
 let vm;
 

spec/javascripts/boards/components/labels_select_spec.js

-/* global IssuableContext */
 /* global boardsMockInterceptor */
 /* global BoardService */
 
 import Vue from 'vue';
 import '~/labels_select';
 import LabelsSelect from '~/boards/components/labels_select.vue';
-import '~/issuable_context';
+import IssuableContext from '~/issuable_context';
 import '../mock_data';
 
 let vm;

spec/javascripts/boards/components/weight_select_spec.js

-/* global IssuableContext */
-
 import Vue from 'vue';
 import WeightSelect from '~/boards/components/weight_select.vue';
-import '~/issuable_context';
+import IssuableContext from '~/issuable_context';
 
 let vm;
 let board;

spec/javascripts/boards/milestone_select_spec.js

@@ -2,11 +2,10 @@
 /* global boardObj */
 /* global BoardService */
 /* global mockBoardService */
-/* global IssuableContext */
 
 import Vue from 'vue';
 import MilestoneSelect from '~/boards/components/milestone_select.vue';
-import '~/issuable_context';
+import IssuableContext from '~/issuable_context';
 
 let vm;