Remove locale key

manifest.json

@@ -2,7 +2,6 @@
     "manifest_version": 2,
     "name": "SCELE Fasilkom UI",
     "version": "0.1",
-    "default_locale": "en",
     "description": "This extension will improve your experience with SCELE in Fasilkom UI",
     "author": "Farid Wajdi"
 }
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