Move bitbucket webhook to an external plugin

app/Locale/ja_JP/translations.php

@@ -578,9 +578,6 @@ return array(
     'You already have one subtask in progress' => 'すでに進行中のサブタスクがあります。',
     'Which parts of the project do you want to duplicate?' => 'プロジェクトの何を複製しますか？',
     // 'Disallow login form' => '',
-    'Bitbucket commit received' => 'Bitbucket コミットを受信しました',
-    'Bitbucket webhooks' => 'Bitbucket Webhooks',
-    'Help on Bitbucket webhooks' => 'Bitbucket Webhooks のヘルプ',
     'Start' => '開始',
     'End' => '終了',
     'Task age in days' => 'タスクの経過日数',
@@ -750,19 +747,10 @@ return array(
     // 'User that will receive the email' => '',
     // 'Email subject' => '',
     // 'Date' => '',
-    // 'By @%s on Bitbucket' => '',
-    // 'Bitbucket Issue' => '',
-    // 'Commit made by @%s on Bitbucket' => '',
-    // 'Commit made by @%s on Gitlab' => '',
     // 'Add a comment log when moving the task between columns' => '',
     // 'Move the task to another column when the category is changed' => '',
     // 'Send a task by email to someone' => '',
     // 'Reopen a task' => '',
-    // 'Bitbucket issue opened' => '',
-    // 'Bitbucket issue closed' => '',
-    // 'Bitbucket issue reopened' => '',
-    // 'Bitbucket issue assignee change' => '',
-    // 'Bitbucket issue comment created' => '',
     // 'Column change' => '',
     // 'Position change' => '',
     // 'Swimlane change' => '',