chore(icons): remove outdated developing with carbon section (#1317)

src/pages/guidelines/icons/usage.mdx

@@ -132,54 +132,3 @@ When used next to text, icons should be center-aligned.
 
   </DoDont>
 </DoDontRow>
-
-## Developing with icons
-
-### SVG Icons
-
-#### Requirements:
-
-Install `carbon-icons`.
-
-Full installation details can be found in the Carbon icons [GitHub repo](https://github.com/carbon-design-system/carbon-icons).
-
-### Main files
-
-`carbon-icons` ships with two main SVG files:
-
-| Filename            | Description                                                                                             | Supported versions |
-| ------------------- | ------------------------------------------------------------------------------------------------------- | ------------------ |
-| _carbon-icons.svg_  | Contains current icons (consolidated subset of legacy icons used in IBM Bluemix)                        | `3.x` & newer      |
-| _carbon-icons.json_ | JSON file created from carbon-icons.svg, used in [Carbon](/guidelines/iconography/library)              | `3.x` & newer      |
-| _carbon-icons.js_   | JS module created from carbon-icons.svg, used in `Icon` React Component in [carbon-components-react](#) | `3.x` & newer      |
-| _icons.json_        | legacy JSON file created from sprite.svg                                                                | `1.x`,`2.x`&`3.x`  |
-| _legacy-icons.js_   | JS module created from sprite.svg                                                                       | `3.x` only         |
-
-### Accessibility
-
-For screen reader accessibility, provide a context-rich title for the SVG using `<title>` element.
-
-```html
-<svg>
-  <title>Add a new service</title>
-  <use xlink:href="/carbon-icons/dist/icon--add--glyph"></use>
-</svg>
-```
-
-If support for older browsers is needed, use the `aria-labelledby` attribute to reference the `<title>` element using an `id`.
-
-The `<title>` element will be read by the screen reader to the user, so it should describe its purpose.
-
-Make sure that you do not duplicate this `id`.
-
-```html
-<svg aria-labelledby="add">
-  <title id="add">Add a new service</title>
-  <use xlink:href="/carbon-icons/dist/icon--add"></use>
-</svg>
-```
-
-<Title> For more details on accessibility, see the following resources: </Title>
-
-- "Accessible SVGs" via [CSS-Tricks](https://css-tricks.com/accessible-svgs/)
-- "5.4 The 'desc' and 'title' elements" via [W3C.org](https://www.w3.org/TR/SVG11/struct.html#DescriptionAndTitleElements)