Removed unused string

Author: litetex

app/src/main/res/values-bg/strings.xml

@@ -513,7 +513,6 @@
     <string name="songs">Песни</string>
     <string name="artists">Изпълнители</string>
     <string name="albums">Албуми</string>
-    <string name="settings_category_notification_title">Известие</string>
     <string name="recent">Скорошни</string>
     <string name="metadata_category">Категория</string>
     <string name="download_has_started">Изтеглянето започна</string>

app/src/main/res/values-te/strings.xml

@@ -233,5 +233,4 @@
     <string name="peertube_instance_add_help">ఉదాహరణ URLని నమోదు చేయండి</string>
     <string name="peertube_instance_add_fail">ఉదాహరణను ధృవీకరించడం సాధ్యపడలేదు</string>
     <string name="peertube_instance_add_exists">ఉదాహరణ ఇప్పటికే ఉంది</string>
-    <string name="settings_category_notification_title">నోటిఫికేషన్</string>
 </resources>

app/src/main/res/values-zh-rHK/strings.xml

@@ -181,7 +181,6 @@
     <string name="albums">專輯</string>
     <string name="peertube_instance_add_https_only">淨係支援 HTTPS 嘅 URL</string>
     <string name="settings_category_debug_title">除錯</string>
-    <string name="settings_category_notification_title">通知</string>
     <string name="undo">復原</string>
     <string name="file_deleted">刪除咗個檔案</string>
     <string name="always">幾時都係</string>