Lint fixes

src/components/megamenu/MegaMenu.vue

@@ -6,7 +6,7 @@
                 <a :href="category.url||'#'" class="p-menuitem-link" :target="category.target" @click="onCategoryClick($event, category)" @keydown="onCategoryKeydown($event, category)">
                     <span v-if="category.icon" :class="getCategoryIcon(category)"></span>
                     <span class="p-menuitem-text">{{category.label}}</span>
-                    <span v-if="category.items" :class="getCategorySubMenuIcon(category)"></span>
+                    <span v-if="category.items" :class="getCategorySubMenuIcon()"></span>
                 </a>
                 <div class="p-megamenu-panel" v-if="category.items">
                     <div class="p-grid">
@@ -173,7 +173,7 @@ export default {
                 this.activeItem = item;
             }
         },
-        collapseMenu(item) {
+        collapseMenu() {
             this.activeItem = null;
         },
         findNextItem(item) {
@@ -210,7 +210,7 @@ export default {
                 'p-disabled': category.disabled
             }, category.class];
         },
-        getCategorySubMenuIcon(category) {
+        getCategorySubMenuIcon() {
             return ['p-submenu-icon pi pi-fw', {
                 'pi-caret-down': this.horizontal,
                 'pi-caret-right': this.vertical