[DevTools] Remove a bunch of styles from inspectorStyle.css.

third_party/WebKit/Source/devtools/front_end/ui/inspectorStyle.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 42 matching lines @@
 
 .platform-mac {
     color: rgb(48, 57, 66);
     font-family: '.SFNSDisplay-Regular', 'Helvetica Neue', 'Lucida Grande', sans-serif;
 }
 
 .platform-windows {
     font-family: 'Segoe UI', Tahoma, sans-serif;
 }
 
-label:hover input {
-    box-shadow: 0 0 3px highlight;
-}
-
-fieldset[disabled] label:hover input {
-    box-shadow: none;
-}
-
-.object-popover-container {
-    display: inline-block;
-}
-
-.error-message {
-    color: red;
-}
-
-.-theme-with-dark-background .error-message {
-    color: hsl(0, 100%, 65%);
-}
-
 .panel {
     display: flex;
     overflow: hidden;
     position: absolute;
     top: 0;
     left: 0;
     right: 0;
     bottom: 0;
     z-index: 0;
 }
 
 .panel-sidebar {
     overflow-x: hidden;
     background-color: #f3f3f3;
 }
 
 iframe.extension {
     flex: auto;
     width: 100%;
     height: 100%;
 }
 
 iframe.panel.extension {
     display: block;
     height: 100%;
 }
 
-.properties-accessor-property-name {
-    font-style: italic;
-}
-
-.child-editing {
-    color: #222 !important;
-    text-decoration: none !important;
-    overflow: visible !important;
-}
-
 .drawer-toolbar {
     margin-right: -6px;
 }