Revert of [DevTools] Show icon in top toolbar when Node target is available

third_party/WebKit/Source/devtools/front_end/main/nodeIcon.css

Index: third_party/WebKit/Source/devtools/front_end/main/nodeIcon.css
diff --git a/third_party/WebKit/Source/devtools/front_end/main/nodeIcon.css b/third_party/WebKit/Source/devtools/front_end/main/nodeIcon.css
deleted file mode 100644
index 326247d333a78ab08fd73ca13f81f8e17c86c731..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/devtools/front_end/main/nodeIcon.css
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * Copyright 2017 The Chromium Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-.node-icon {
-    width: 28px;
-    height: 26px;
-    background-image: url(Images/nodeIcon.png);
-    background-size: 17px 17px;
-    background-repeat: no-repeat;
-    background-position: center;
-    opacity: 0.8;
-}
-
-.node-icon:hover {
-    opacity: 1.0;
-}
-
-.node-icon.inactive {
-    filter: grayscale(100%);
-}