feat(components): remove IBM Helvetica Neue usage (#4752)

packages/components/demo/scss/_page.scss

@@ -95,10 +95,6 @@ td {
       @include type-style('productive-heading-01');
       font-weight: 300;
       line-height: 1.25;
-
-      &#helvetica-neue-light {
-        font-weight: 300;
-      }
     }
 
     h2 {

packages/components/src/globals/scss/__tests__/css--font-face-test.js

@@ -24,22 +24,6 @@ $css--font-face: false;
     expect(result.css.toString()).toMatchSnapshot();
   });
 
-  it('should output helvetica if $css--font-face is true and $css--plex is false', async () => {
-    const { result } = await render(`
-$css--reset: false;
-$css--font-face: true;
-$css--plex: false;
-@import '../css--font-face';
-`);
-
-    expect(result.css.toString()).toEqual(
-      expect.stringContaining('@font-face')
-    );
-    expect(result.css.toString()).toEqual(
-      expect.stringContaining(`font-family: 'IBM Helvetica'`)
-    );
-  });
-
   describe('experimental', () => {
     it('should output @font-face blocks from elements if components-x flag is enabled', async () => {
       const { result } = await render(`

packages/components/src/globals/scss/_css--font-face.scss

@@ -5,98 +5,17 @@
 // LICENSE file in the root directory of this source tree.
 //
 
-$font-path: 'https://unpkg.com/carbon-components@latest/src/globals/fonts' !default;
-
 @import './vendor/@carbon/elements/scss/import-once/import-once';
-@import 'deprecate';
 @import 'helper-mixins';
 @import './vendor/@carbon/elements/scss/type/font-face/mono';
 @import './vendor/@carbon/elements/scss/type/font-face/sans';
 
-/// @deprecated (For v10) Superseded by `@include carbon--font-face-sans()`, `@include carbon--font-face-mono()`, etc.
-/// @access private
-/// @group global-font-face
-@mixin check-default-font-path {
-  @if (str-index($font-path, 'https://unpkg.com/') == 1) {
-    @warn 'The default font path (#{$font-path}) should be used only for demonstration/evaluation purposes. For production applications, please host fonts in your own CDN and change `$font-path` accordingly.';
-    @content;
-  } @else {
-    @content;
-  }
-}
-
-/// Helvetica Neue font face declarations
-/// @access public
-/// @deprecated (For v10) Use `@include carbon--font-face-sans()`, `@include carbon--font-face-mono()`, etc.
-/// @group global-font-face
-@mixin helvetica-font-face {
-  // Default font directory, `!default` flag allows user override.
-  // (font files are configured to be served as static assets from server.js)
-  @include deprecate(
-    'Usage of Helvetica font in `carbon-components` has been deprecated.'
-  ) {
-    @include check-default-font-path {
-      @font-face {
-        font-family: 'IBM Helvetica';
-        font-style: normal;
-        font-weight: 300;
-        src: url('#{$font-path}/helvetica-neue-light.woff2') format('woff2'),
-          url('#{$font-path}/helvetica-neue-light.woff') format('woff');
-      }
-
-      @font-face {
-        font-family: 'IBM Helvetica';
-        font-style: italic;
-        font-weight: 300;
-        src: url('#{$font-path}/helvetica-neue-light-italic.woff2')
-            format('woff2'),
-          url('#{$font-path}/helvetica-neue-light-italic.woff') format('woff');
-      }
-
-      @font-face {
-        font-family: 'IBM Helvetica';
-        font-style: normal;
-        font-weight: 400;
-        src: url('#{$font-path}/helvetica-neue-roman.woff2') format('woff2'),
-          url('#{$font-path}/helvetica-neue-roman.woff') format('woff');
-      }
-
-      @font-face {
-        font-family: 'IBM Helvetica';
-        font-style: italic;
-        font-weight: 400;
-        src: url('#{$font-path}/helvetica-neue-roman-italic.woff2')
-            format('woff2'),
-          url('#{$font-path}/helvetica-neue-roman-italic.woff') format('woff');
-      }
-
-      @font-face {
-        font-family: 'IBM Helvetica';
-        font-style: normal;
-        font-weight: 700;
-        src: url('#{$font-path}/helvetica-neue-bold.woff2') format('woff2'),
-          url('#{$font-path}/helvetica-neue-bold.woff') format('woff');
-      }
-
-      @font-face {
-        font-family: 'IBM Helvetica';
-        font-style: italic;
-        font-weight: 700;
-        src: url('#{$font-path}/helvetica-neue-bold-italic.woff2')
-            format('woff2'),
-          url('#{$font-path}/helvetica-neue-bold-italic.woff') format('woff');
-      }
-    }
-  }
-}
-
 @include exports('css--font-face') {
   @if not variable-exists('css--font-face') or $css--font-face == true {
-    @if variable-exists('css--plex') and $css--plex == true {
-      @include carbon--font-face-mono();
-      @include carbon--font-face-sans();
-    } @else {
-      @include helvetica-font-face;
+    @include carbon--font-face-mono();
+    @include carbon--font-face-sans();
+    @if not variable-exists('css--plex') or $css--plex == false {
+      @warn 'Usage of Helvetica font in `carbon-components` has been removed. IBM Plex will be emitted instead';
     }
   }
 }