css: remove unused or redundant rules.

app/javascript/src/styles/base/000_vars.scss

@@ -1,7 +1,6 @@
 $menu_color: #F5F5FF;
 $link_color: hsl(213, 100%, 50%);
 $link_hover_color: lighten($link_color, 25%);
-$link_dark_color: darken($link_color, 25%);
 $highlight_color: lighten($link_color, 45%);
 $h1_size: 2em;
 $h2_size: 1.5em;
@@ -17,8 +16,6 @@ $h1_padding: 0.8em 0 0.25em 0;
 $h2_padding: 0.8em 0 0.25em 0;
 $h3_padding: 0.8em 0 0.25em 0;
 $h4_padding: 0.8em 0 0.25em 0;
-$baseline: 1em;
-$basefont: 100%;
 $base_font_family: Verdana, Helvetica, sans-serif;
 $preview_has_children_color: #0F0;
 $preview_has_parent_color: #CC0;

app/javascript/src/styles/base/020_base.scss

@@ -3,16 +3,10 @@
 body {
   background-color: #FFF;
   font-family: $base_font_family;
-  padding: 0;
-  margin: 0;
   font-size: 87.5%;
   line-height: 1.25em;
 }
 
-article, section {
-  display: block;
-}
-
 abbr[title=required] {
   display: none;
 }
@@ -37,13 +31,8 @@ dt {
   font-weight: bold;
 }
 
-em {
-  font-style: italic;
-}
-
 h1, h2, h3, h4, h5, h6 {
   font-family: Tahoma, Verdana, Helvetica, sans-serif;
-  font-weight: bold;
   line-height: 1.5em;
 }
 
@@ -56,7 +45,6 @@ h2 {
 }
 
 h3, h4, h5, h6 {
-  font-weight: bold;
   font-size: $h3_size;
 }
 
@@ -67,7 +55,6 @@ fieldset {
 header {
   margin: 0 0 1em 0;
   padding: 0;
-  display: block;
 }
 
 img {
@@ -75,16 +62,6 @@ img {
   vertical-align: middle;
 }
 
-img.wait {
-  margin-left: 5px;
-}
-
-legend {
-  font-size: $h2_size;
-  font-weight: bold;
-  margin-bottom: 0.5em;
-}
-
 menu {
   margin: 0;
   padding: 0;
@@ -106,14 +83,6 @@ p {
   margin-bottom: 1em;
 }
 
-section {
-  display: block;
-}
-
-strong {
-  font-weight: bold;
-}
-
 table tfoot {
   margin-top: 2em;
 }