remove eu/nl/amsterdam/mrowr.me.k (#161)

See: https://github.com/hyperboria/peers/issues/106#issuecomment-437296948

eu/nl/amsterdam/mrowr.me.k

@@ -1,9 +0,0 @@
-{
-    "188.166.3.174:4841":{
-        "contact":"oniichan@mrowr.me",
-        "password":"public-20150903-6pb6aEKDDKVr9zsBJIyDUYfrXYzQv1",
-        "peerName":"mrowr.me",
-        "publicKey":"s680fh7g69ww3y9cmrxt910u5hvrwrmcnln1sz6mq1jk5mquq8k0.k",
-        "user":"katt"
-    }
-}