Update config.json (#266749)

Author: security-alliance-bot

src/config.json

@@ -68559,7 +68559,6 @@
     "cetus.airdropsalert.dev",
     "deep.airdropsalert.dev",
     "zen.airdropsalert.dev",
-    "brtr.airdropsalert.dev",
     "umbra.airdropsalert.dev",
     "link.airdropsalert.dev",
     "zbcn.airdropsalert.dev",