Remove twitter handler from link check (#532)

Somehow Twitter changed the rules. This can't be checked by HTTP HEAD.
diff --git a/.dlc.json b/.dlc.json
index 3e55383..1ae0883 100644
--- a/.dlc.json
+++ b/.dlc.json
@@ -23,6 +23,9 @@
     },
     {
       "pattern": "^https://mvnrepository.com/"
+    },
+    {
+      "pattern": "^https://twitter.com*"
     }
   ],
   "timeout": "10s",