Locales: Remove Cyrillic text from Serbian (Latin)

locales/sr.json

@@ -504,6 +504,5 @@
     "generic_views_count_0": "{{count}} pregled",
     "generic_views_count_1": "{{count}} pregleda",
     "generic_views_count_2": "{{count}} pregleda",
-    "Import YouTube watch history (.json)": "Uvezi YouTube istoriju gledanja (.json)",
-    "toggle_theme": "Укључи тему"
+    "Import YouTube watch history (.json)": "Uvezi YouTube istoriju gledanja (.json)"
 }