[O] Remove unnecessary getTitle()

src/components/navigation/navigation.ts

@@ -111,23 +111,6 @@ export default class Navigation extends Vue
         window.scrollTo(0, 0);
     }
 
-    /**
-     * Get title for index
-     *
-     * @param index Index
-     */
-    getTitle(index: string)
-    {
-        // Course
-        if (index.startsWith('course'))
-        {
-            return this.findCourse(index.split('/')[1], 0).name;
-        }
-
-        // Others
-        return FormatUtils.toTitleCase(index);
-    }
-
     /**
      * Move to the next course
      *

src/components/navigation/navigation.vue

@@ -14,7 +14,7 @@
             <el-submenu index="courses">
                 <template slot="title">Courses</template>
                 <el-menu-item v-for="course in courses"
-                              :index="formatCourseIndex(course)"
+                              :index="course.urlHash"
                               :key="course.name">{{course.name}}</el-menu-item>
             </el-submenu>