test: links: fix failures (#997)

* test: links: fix and sort exclude-links.txt

* links: remove dead source link

scripts/exclude-links.txt

@@ -1,23 +1,20 @@
 http://127.0.0.1:10000/devstoreaccount1;
-https://s3-us-east-2.amazonaws.com/dvc-public/code/foo/bar
-https://s3-us-east-2.amazonaws.com/dvc-public/data/foo/bar
-https://s3-us-east-2.amazonaws.com/dvc-public/remote/foo/bar
-https://s3-us-east-2.amazonaws.com/dvc-s3-repo/
-https://s3-us-east-2.amazonaws.com/dvc-s3-repo/deb/foo
-https://s3-us-east-2.amazonaws.com/dvc-s3-repo/rpm/foo
+http://localhost:3000/
+http://millionsongdataset.com/pages/getting-dataset/
+http://ogp.me/ns
+https://$
+https://accounts.google.com/o/oauth2/auth
 https://api.github.com/repos/$
 https://blog.$
 https://circleci.com/gh/iterative/dvc.org
+https://code.dvc.org/foo/bar
+https://data.dvc.org/foo/bar
 https://discuss.$
+https://drive.google.com/drive/folders/0AIac4JZqHhKmUk9PDA
+https://dvc.org$
+https://dvc.org/doc/command-reference/foo
 https://dvc.org/foo
 https://dvc.org/static/img/<filename>.gif
-https://dvc.org/doc/command-reference/foo
-https://code.dvc.org/foo/bar
-https://data.dvc.org/foo/bar
-https://man.dvc.org/foo
-https://remote.dvc.org/foo/bar
-https://remote.dvc.org/get-started
-https://www.dvc.org/foo
 https://example.com/data.txt
 https://example.com/foo
 https://example.com/foo/bar?baz
@@ -30,14 +27,18 @@ https://github.com/example/project.git
 https://github.com/example/registry
 https://github.com/iterative/dvc.org/blob/master/public$
 https://github.com/iterative/dvc/releases/download/$
-https://accounts.google.com/o/oauth2/auth
-https://drive.google.com/drive/folders/0AIac4JZqHhKmUk9PDA
-https://www.kaggle.com/rtatman/kerneld4769833fe
-http://localhost:3000/
-http://millionsongdataset.com/pages/getting-dataset/#subset
+https://man.dvc.org/foo
+https://marketplace.visualstudio.com/items?itemName=stkb.rewrap
 https://myendpoint.com
 https://object-storage.example.com
-http://ogp.me/ns#
-https://marketplace.visualstudio.com/items?itemName=stkb.rewrap
+https://remote.dvc.org/foo/bar
+https://remote.dvc.org/get-started
+https://s3-us-east-2.amazonaws.com/dvc-public/code/foo/bar
+https://s3-us-east-2.amazonaws.com/dvc-public/data/foo/bar
+https://s3-us-east-2.amazonaws.com/dvc-public/remote/foo/bar
+https://s3-us-east-2.amazonaws.com/dvc-s3-repo/
+https://s3-us-east-2.amazonaws.com/dvc-s3-repo/deb/foo
+https://s3-us-east-2.amazonaws.com/dvc-s3-repo/rpm/foo
+https://www.dvc.org/foo
+https://www.kaggle.com/rtatman/kerneld4769833fe
 https://www.youtube.com/embed/$
-https://$

src/components/Documentation/Markdown/styles.js

@@ -197,7 +197,6 @@ export const ExternalLink = styled.a`
     width: 12px;
     height: 12px;
     margin-left: 1px;
-    /* Icon source https://en.wikipedia.org/w/skins/Vector/images/external-link-ltr-icon.svg */
     content: url(/static/img/external-link.svg);
   }
 `