Revert font awesome 5 changes

We are still pushing ahead on this 100% just need a bit longer to prepare
all plugins

spec/components/svg_sprite/svg_sprite_spec.rb

@@ -1,69 +0,0 @@
-require 'rails_helper'
-
-describe SvgSprite do
-  it 'can generate a bundle' do
-    bundle = SvgSprite.bundle
-    expect(bundle).to match(/heart/)
-    expect(bundle).to match(/angle-double-down/)
-  end
-
-  it 'can get a consistent version string' do
-    version1 = SvgSprite.version
-    version2 = SvgSprite.version
-
-    expect(version1).to eq(version2)
-  end
-
-  it 'includes  Font Awesome 4.7 icons from badges' do
-    Fabricate(:badge, name: 'Custom Icon Badge', icon: 'fa-gamepad')
-    expect(SvgSprite.bundle).to match(/gamepad/)
-  end
-
-  it 'includes  Font Awesome 5 icons from badges' do
-    Fabricate(:badge, name: 'Custom Icon Badge', icon: 'far fa-building')
-    expect(SvgSprite.bundle).to match(/building/)
-  end
-
-  it 'includes icons defined in themes' do
-    theme = Fabricate(:theme)
-    theme.set_field(target: :settings, name: :yaml, value: "custom_icon: gas-pump")
-    theme.save!
-    expect(SvgSprite.bundle).to match(/gas-pump/)
-
-    setting = theme.settings.find { |s| s.name == :custom_icon }
-    setting.value = 'gamepad'
-    expect(SvgSprite.bundle).to match(/gamepad/)
-
-    setting = theme.settings.find { |s| s.name == :custom_icon }
-    setting.value = 'fab fa-bandcamp'
-    expect(SvgSprite.bundle).to match(/fab-bandcamp/)
-
-  end
-
-  it 'includes icons from SiteSettings' do
-    SiteSetting.svg_icon_subset = 'blender|drafting-compass|fab-bandcamp'
-    bundle = SvgSprite.bundle
-    expect(bundle).to match(/blender/)
-    expect(bundle).to match(/drafting-compass/)
-    expect(bundle).to match(/fab-bandcamp/)
-    expect(bundle).not_to match(/dragon/)
-  end
-
-  it 'includes icons from plugins' do
-    DiscoursePluginRegistry.register_svg_icon('blender')
-    DiscoursePluginRegistry.register_svg_icon('fab fa-bandcamp')
-    bundle = SvgSprite.bundle
-    expect(bundle).to match(/blender/)
-    expect(bundle).to match(/fab-bandcamp/)
-  end
-
-  it "includes Font Awesome 4.7 icons as group flair" do
-    group = Fabricate(:group, flair_url: "fa-air-freshener")
-    expect(SvgSprite.bundle).to match(/air-freshener/)
-  end
-
-  it "includes Font Awesome 5 icons as group flair" do
-    group = Fabricate(:group, flair_url: "far fa-building")
-    expect(SvgSprite.bundle).to match(/building/)
-  end
-end