Infra: remove two of the five instances of title at top of pages (#2532)

* Infra: remove one of the four instances of title at top of pages

* Infra: remove another of the five instances of title at top of pages

* Infra: but keep PEP number in the breadcrumbs

pep_sphinx_extensions/pep_theme/static/style.css

@@ -309,9 +309,6 @@ dl.footnote > dd {
 #pep-sidebar ul a {
     text-decoration: none;
 }
-#toc-title {
-    font-weight: bold;
-}
 #source {
     padding-bottom: 2rem;
     font-weight: bold;

pep_sphinx_extensions/pep_theme/templates/page.html

@@ -24,7 +24,7 @@
             <ul class="breadcrumbs">
                 <li><a href="https://www.python.org/" title="The Python Programming Language">Python</a> &raquo; </li>
                 <li><a href="{{ pathto("pep-0000") }}">PEP Index</a> &raquo; </li>
-                <li>{{ title }}</li>
+                <li>{{ title.split("–")[0].strip() }}</li>
             </ul>
             <button aria-label="Toggle dark mode" onClick="toggleColourScheme()"></button>
         </header>
@@ -33,7 +33,6 @@
         </article>
         <nav id="pep-sidebar">
             <h2>Contents</h2>
-            <p id="toc-title">{{ title }}</p>
             {{ toc }}
             <br />
             {%- if not sourcename.startswith("pep-0000") %}