Auto merge of #4362 - Turbo87:docs-dropdown, r=locks

Header: Remove obsolete "Docs" dropdown

The relevant links are now in the footer and everything else is already linked in "The Cargo Book", so there is no need for this dropdown in the header anymore.

Author: bors

app/components/header.hbs

@@ -18,29 +18,6 @@
         Browse All Crates
       </LinkTo>
       <span local-class="sep">|</span>
-      <Dropdown as |dd|>
-        <dd.Trigger local-class="dropdown-button">
-          Docs
-        </dd.Trigger>
-
-        <dd.Menu local-class="doc-links" as |menu|>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/getting-started/'>Getting Started</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/guide/'>Guide</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html'>Specifying Dependencies</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/publishing.html'>Publishing on crates.io</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/faq.html'>FAQ</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/manifest.html'>Cargo.toml Format</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/build-scripts.html'>Build Scripts</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/config.html'>Configuration</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/pkgid-spec.html'>Package ID specs</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/environment-variables.html'>Environment Variables</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/source-replacement.html'>Source Replacement</a></menu.Item>
-          <menu.Item><a href='https://doc.rust-lang.org/cargo/reference/external-tools.html'>External Tools</a></menu.Item>
-          <menu.Item><LinkTo @route="policies">Policies</LinkTo></menu.Item>
-          <menu.Item><LinkTo @route="category-slugs">List of category slugs</LinkTo></menu.Item>
-        </dd.Menu>
-      </Dropdown>
-      <span local-class="sep">|</span>
       {{#if this.session.currentUser}}
         <Dropdown data-test-user-menu as |dd|>
           <dd.Trigger local-class="dropdown-button" data-test-toggle>