Update translation files

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

Translation: Calendula/Strings
Translate-URL: https://weblate.dev.jeanlucmakiola.de/projects/calendula/strings/

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

@@ -6,7 +6,6 @@
         <item>Days</item>
         <item>Weeks</item>
     </string-array>
-    <string name="app_name"></string>
     <string name="app_tagline">一个现代化的日历应用</string>
     <string name="state_loading">加载中…</string>
     <string name="state_retry">推迟</string>