docs: update homepage title and remove version display

- Change title from "The Python WSGI Server" to "Serve Python Apps on the Web"
- Remove "Version {{ version }}" text from hero section
- Remove unused .hero__version CSS

Author: benoitc

docs/content/index.md

@@ -6,8 +6,7 @@ title: Gunicorn - Python WSGI HTTP Server
 <section class="hero">
   <div class="container">
     <img class="hero__logo" src="assets/gunicorn.svg" alt="Gunicorn" style="width: 350px;" />
-    <p class="hero__version">Version {{ version }}</p>
-    <h1>The Python WSGI Server</h1>
+    <h1>Serve Python on the Web</h1>
     <p class="hero__tagline">
       Battle-tested. Production-ready. One command to serve your Python apps.
     </p>

docs/content/styles/overrides.css

@@ -253,12 +253,6 @@
   box-shadow: none;
 }
 
-.md-typeset .hero__version {
-  font-weight: 700;
-  font-size: 0.9rem;
-  opacity: 0.9;
-}
-
 .md-typeset .hero__logo {
   height: 72px;
   margin-bottom: 1.5rem;