Fix style-lint errors in wiki.scss

There were two errors: duplicate styles and @extend used with a class
name. I added `.top-area` class to all the instances where
`.wiki-page-header` is used since %top-area didn't really make a lot of
sense as a placeholder selector. This is also consistent with behaviour
on other pages where the `.top-area` class is used alongside the other
classes for the specific header styling.

1 files changed, 0 insertions, 17 deletions

diff --git a/app/assets/stylesheets/pages/wiki.scss b/app/assets/stylesheets/pages/wiki.scss
index 60400f10ca5..379df1c4db1 100644
--- a/app/assets/stylesheets/pages/wiki.scss
+++ b/app/assets/stylesheets/pages/wiki.scss
@@ -1,19 +1,3 @@
-.new-wiki-page {
-  .new-wiki-page-slug-tip {
-    display: inline-block;
-    max-width: 100%;
-    margin-top: 5px;
-  }
-}
-
-.wiki-form {
-  .edit-wiki-page-slug-tip {
-    display: inline-block;
-    max-width: 100%;
-    margin-top: 5px;
-  }
-}
-
 .title .edit-wiki-header {
   width: 780px;
   margin-left: auto;
@@ -22,7 +6,6 @@
 }
 
 .wiki-page-header {
-  @extend .top-area;
   position: relative;
 
   .wiki-breadcrumb {