Remove support for Duo

Author: wooorm

.eslintignore

@@ -1,4 +1,3 @@
-components/
 coverage/
 remark-lint.js
 remark-lint.min.js

.gitignore

@@ -1,6 +1,5 @@
 .DS_Store
 *.log
-components/
 coverage/
 node_modules/
 remark-lint.js

.jscs.json

@@ -1,6 +1,5 @@
 {
   "excludeFiles": [
-    "components/",
     "coverage/",
     "node_modules/",
     "remark-lint.js",

.remarkignore

@@ -1,7 +1,4 @@
 # `node_modules/` is already ignored.
 
-# Duo’s components include docs.
-components
-
 # Do not process fixtures.
 test

component.json

@@ -35,9 +35,8 @@ a powerful markdown processor powered by [plugins][remark-plugins]
 npm install remark-lint
 ```
 
-**remark-lint** is also available for [duo][duo-install],
-and as an AMD, CommonJS, and globals module, [uncompressed and
-compressed][releases].
+**remark-lint** is also available as an AMD, CommonJS, and globals
+module, [uncompressed and compressed][releases].
 
 ## Command line
 
@@ -232,8 +231,6 @@ excluding `remark-lint-no-` or `remark-lint-`
 
 [npm-install]: https://docs.npmjs.com/cli/install
 
-[duo-install]: http://duojs.org/#getting-started
-
 [releases]: https://github.com/wooorm/remark-lint/releases
 
 [author]: http://wooorm.com