chore(markdown): Restructuring dev docs

markdown/dev/reference/api/macros/rmd/en.md

@@ -0,0 +1,30 @@
+---
+title: rmd
+---
+
+The `rmd` macro removes a dimension.
+It is provided by the [dimension plugin](/reference/plugins/dimension/).
+
+To be able to use this plugin, you need to give your dimension an id:
+
+```js
+macro('ld', {
+  from: points.from,
+  to: points.to,
+  d: 0,
+  id: 'example'
+})
+```
+
+Now you can remove it as such:
+
+```js
+macro('rmd', {
+  id: 'example'
+})
+```
+
+| Property | Default | Type     | Description | 
+|----------|---------|----------|-------------|
+| `id`     |         | `string` | The id of the dimension to remove |
+