cleaning up old files

Author: nicolaskruchten

_posts/plotly_js/2019-07-03-is-plotly-free-js.md

@@ -1,6 +1,7 @@
 ---
 name: Is Plotly.js Free?
 permalink: javascript/is-plotly-free/
+redirect_from: javascript/open-source-announcement/
 description: Plotly's open-source graphing libraries are free to use, work offline and don't require any account registration. Plotly also has commercial offerings, such as Dash Enterprise and Chart Studio Enterprise.
 layout: base
 no_in_language: true