Make hardcoded hours string translatable

app/Locale/zh_TW/translations.php

@@ -256,7 +256,6 @@ return array(
     'Do you really want to remove this sub-task?' => '確認要刪除此子任務？',
     'Remaining:' => '剩餘：',
     'hours' => '小時',
-    'spent' => '花費',
     'estimated' => '評估',
     'Sub-Tasks' => '子任務',
     'Add a sub-task' => '增加子任務',
@@ -481,7 +480,6 @@ return array(
     'Link removed successfully.' => '成功删除關聯。',
     'Link labels' => '關聯標籤',
     'Link modification' => '關聯修改',
-    'Links' => '關聯',
     'Opposite label' => '反向標籤',
     'Remove a link' => '删除關聯',
     'The labels must be different' => '標籤不能相同',
@@ -522,7 +520,6 @@ return array(
     'CAD - Canadian Dollar' => '加元',
     'CHF - Swiss Francs' => '瑞士法郎',
     'Custom Stylesheet' => '自定義樣式表',
-    'download' => '下载',
     'EUR - Euro' => '歐元',
     'GBP - British Pound' => '英鎊',
     'INR - Indian Rupee' => '印度盧比',
@@ -593,7 +590,6 @@ return array(
     'Existing due date' => '已逾期',
     'Factor to calculate new due date: ' => '超期因素',
     'Month(s)' => '月',
-    'Recurrence' => '循環',
     'This task has been created by: ' => '此任務被誰建立：',
     'Recurrent task has been generated:' => '循環任務已建立：',
     'Timeframe to calculate new due date: ' => '計算逾期時間表',
@@ -731,7 +727,6 @@ return array(
     'NOK - Norwegian Krone' => '克朗',
     'Show this column' => '顯示任務欄',
     'Hide this column' => '隱藏任務欄',
-    'open file' => '打開文件',
     'End date' => '结束日期',
     'Users overview' => '使用者總覽',
     'Members' => '成員',
@@ -1380,4 +1375,6 @@ return array(
     // '%s moved the task #%d to the column "%s"' => '',
     // '%s moved the task #%d to the position %d in the column "%s"' => '',
     // '%s moved the task #%d to the swimlane "%s"' => '',
+    // '%sh spent' => '',
+    // '%sh estimated' => '',
 );