Remove redundant CSS classes

Author: cheton

docs/common.css

@@ -2,23 +2,3 @@ html, body {
     font-family: Arial, Helvetica, sans-serif;
     min-width: 800px;
 }
-.head {
-    min-height: 400px;
-    text-align: center;
-    padding-top: 100px;
-    font-weight: 300;
-}
-.head .lead {
-    font-weight: bold;
-    font-size: 64px;
-    font-family: "Open sans", Helvetica, Arial;
-    margin-bottom: 6px;
-    line-height: 1.15em;
-}
-.head .tagline {
-    margin-bottom: 25px;
-    font-size: 30px;
-}
-.top-space {
-    margin-top: 60px;
-}