Update translation files

Updated by "Remove blank strings" add-on in Weblate.

Translation: Agendula/agendula
Translate-URL: https://weblate.dev.jeanlucmakiola.de/projects/agendula/agendula/

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

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="task_deleted"></string>
     <string name="app_name">Agendula</string>
     <string name="back">Zpět</string>
     <string name="save">Uložit</string>