cateditor: remove unnecessary 'sections' getter

cateditor/src/components/CatalogContents.vue

@@ -15,7 +15,7 @@
           </DragListHeading>
 
           <div id="sections" class="list-group">
-            <div v-for="item in sections" :key="item.id">
+            <div v-for="item in catalog.sections" :key="item.id">
               <v-hover :key="item.id">
                 <v-list-tile
                   slot-scope="{ hover }"
@@ -186,7 +186,6 @@ export default {
     ]),
     ...mapGetters([
       'section',
-      'sections',
       'selectedSection',
       'selectedModel',
       'selectedMaterial',

cateditor/src/pages/editor/store/index.js

@@ -30,10 +30,6 @@ export const store = new Vuex.Store({
       return state.materials[id]
     },
 
-    sections: state => {
-      return state.catalog.sections
-    },
-
     section: state => id => {
       return state.catalog.sections.find(s => s.id === id)
     },