Drop CSP plugin-types spec reference & deprecate (#2643)

* Push the “fixable flaws” button

* Drop CSP plugin-types spec reference & deprecate

w3c/webappsec-csp#394 completely removed the
plugin-types directive from the CSP spec. So it’s now deprecated and no
longer part of any current spec.

files/en-us/web/http/headers/content-security-policy/plugin-types/index.html

@@ -2,17 +2,17 @@
 title: 'CSP: plugin-types'
 slug: Web/HTTP/Headers/Content-Security-Policy/plugin-types
 tags:
-- CSP
-- Content-Security-Policy
-- Directive
-- Flash
-- HTTP
-- Java
-- Plugin
-- Plugins
-- Security
+  - CSP
+  - Content-Security-Policy
+  - Directive
+  - Flash
+  - HTTP
+  - Java
+  - Plugin
+  - Plugins
+  - Security
 ---
-<div>{{HTTPSidebar}}</div>
+<div>{{HTTPSidebar}}{{deprecated_header}}</div>
 
 <p>The HTTP {{HTTPHeader("Content-Security-Policy")}} (CSP)
   <code><strong>plugin-types</strong></code> directive restricts the set of plugins that
@@ -58,7 +58,7 @@ <h2 id="Syntax">Syntax</h2>
 <dl>
   <dt>&lt;type&gt;/&lt;subtype&gt;</dt>
   <dd>A valid <a
-      href="/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Complete_list_of_MIME_types">MIME
+      href="/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types">MIME
       type</a>.</dd>
 </dl>
 
@@ -104,11 +104,6 @@ <h2 id="Specifications">Specifications</h2>
     </tr>
   </thead>
   <tbody>
-    <tr>
-      <td>{{specName("CSP 3.0", "#directive-plugin-types", "plugin-types")}}</td>
-      <td>{{Spec2('CSP 3.0')}}</td>
-      <td>No changes.</td>
-    </tr>
     <tr>
       <td>{{specName("CSP 1.1", "#directive-plugin-types", "plugin-types")}}</td>
       <td>{{Spec2('CSP 1.1')}}</td>