Remove Font Awesome from FE guidelines

doc/development/fe_guide/dependencies.md

@@ -8,12 +8,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 ## Package manager
 
-We use [Yarn](https://yarnpkg.com/) to manage frontend dependencies. There are a few exceptions:
-
-- [FontAwesome](https://fontawesome.com/), installed via the `font-awesome-rails` gem: we are working to replace it with
-  [GitLab SVGs](https://gitlab-org.gitlab.io/gitlab-svgs/) icons library.
-- [ACE](https://ace.c9.io/) editor, installed via the `ace-rails-ap` gem.
-- Other dependencies found under `vendor/assets/`.
+We use [Yarn](https://yarnpkg.com/) to manage frontend dependencies. There are a few exceptions, stored in `vendor/assets/`.
 
 ## Updating dependencies
 

doc/development/fe_guide/icons.md

@@ -18,8 +18,6 @@ We are using SVG Icons in GitLab with a SVG Sprite.
 This means the icons are only loaded once, and are referenced through an ID.
 The sprite SVG is located under `/assets/icons.svg`.
 
-Our goal is to replace one by one all inline SVG Icons (as those currently bloat the HTML) and also all Font Awesome icons.
-
 ### Usage in HAML/Rails
 
 To use a sprite Icon in HAML or Rails we use a specific helper function:
@@ -90,11 +88,6 @@ Please use the following function inside JS to render an icon:
 
 ### Usage in HAML/Rails
 
-WARNING:
-Do not use the `spinner` or `icon('spinner spin')` rails helpers to insert
-loading icons. These helpers rely on the Font Awesome icon library which is
-deprecated.
-
 To insert a loading spinner in HAML or Rails use the `loading_icon` helper:
 
 ```haml