Remove UA style for h2-h5 in hgroup

This was introduced in f729a76 but was not implemented in browsers.

Part of #7867.

Author: zcorpan

source

@@ -118127,21 +118127,7 @@ h6 { margin-block-start: 2.33em; margin-block-end: 2.33em; font-size: 0.67em; fo
 <var>x</var> <var>x</var> h1 { margin-block-start: 1.00em; margin-block-end: 1.00em; font-size: 1.17em; }
 <var>x</var> <var>x</var> <var>x</var> h1 { margin-block-start: 1.33em; margin-block-end: 1.33em; font-size: 1.00em; }
 <var>x</var> <var>x</var> <var>x</var> <var>x</var> h1 { margin-block-start: 1.67em; margin-block-end: 1.67em; font-size: 0.83em; }
-<var>x</var> <var>x</var> <var>x</var> <var>x</var> <var>x</var> h1 { margin-block-start: 2.33em; margin-block-end: 2.33em; font-size: 0.67em; }
-
-<var>x</var> hgroup > h1 ~ h2 { margin-block-start: 1.00em; margin-block-end: 1.00em; font-size: 1.17em; }
-<var>x</var> <var>x</var> hgroup > h1 ~ h2 { margin-block-start: 1.33em; margin-block-end: 1.33em; font-size: 1.00em; }
-<var>x</var> <var>x</var> <var>x</var> hgroup > h1 ~ h2 { margin-block-start: 1.67em; margin-block-end: 1.67em; font-size: 0.83em; }
-<var>x</var> <var>x</var> <var>x</var> <var>x</var> hgroup > h1 ~ h2 { margin-block-start: 2.33em; margin-block-end: 2.33em; font-size: 0.67em; }
-
-<var>x</var> hgroup > h1 ~ h3 { margin-block-start: 1.33em; margin-block-end: 1.33em; font-size: 1.00em; }
-<var>x</var> <var>x</var> hgroup > h1 ~ h3 { margin-block-start: 1.67em; margin-block-end: 1.67em; font-size: 0.83em; }
-<var>x</var> <var>x</var> <var>x</var> hgroup > h1 ~ h3 { margin-block-start: 2.33em; margin-block-end: 2.33em; font-size: 0.67em; }
-
-<var>x</var> hgroup > h1 ~ h4 { margin-block-start: 1.67em; margin-block-end: 1.67em; font-size: 0.83em; }
-<var>x</var> <var>x</var> hgroup > h1 ~ h4 { margin-block-start: 2.33em; margin-block-end: 2.33em; font-size: 0.67em; }
-
-<var>x</var> hgroup > h1 ~ h5 { margin-block-start: 2.33em; margin-block-end: 2.33em; font-size: 0.67em; }</code></pre>
+<var>x</var> <var>x</var> <var>x</var> <var>x</var> <var>x</var> h1 { margin-block-start: 2.33em; margin-block-end: 2.33em; font-size: 0.67em; }</code></pre>
 
   <p class="note">The shorthand is used to keep this block at least mildly readable.</p>