[MD settings] removing .css files from internet settings

chrome/browser/resources/settings/internet_page/network_summary_item.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-toggle-button/paper-toggle-button.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_network_list.html">
 <link rel="import" href="chrome://resources/cr_elements/network/cr_network_list_item.html">
 
 <dom-module name="network-summary-item">
-  <link rel="import" type="css" href="network_summary_item.css">
   <template>
+    <style>
+      #details.selectable:hover {
+        background-color: lightgrey;
+      }
+
+      #buttons {
+        align-items: center;
+      }
+
+      .invisible {
+        visibility: hidden;
+      }
+
+      paper-spinner {
+        -webkit-margin-start: 20px;
+      }
+
+      #deviceEnabledButton {
+        -webkit-margin-start: 10px;
+      }
+
+      #listDiv {
+        -webkit-margin-end: 10px;
+        -webkit-margin-start: 40px;
+      }
+
+      #networkList {
+        margin: 5px 0 10px;
+        max-height: 400px;
+      }
+    </style>
     <div class="layout vertical" hidden$="[[isHidden]]">
       <div id="details" class="layout horizontal center"
           on-tap="onDetailsTap_">
         <cr-network-list-item id="detailsItem"
             network-state="[[networkState]]">
         </cr-network-list-item>
         <paper-spinner active="[[showScanning_(deviceState, expanded)]]">
         </paper-spinner>
         <span class="flex"></span>
         <div id="buttons" class="layout horizontal">
@@ skipping 19 matching lines @@
               hidden$="[[!showKnownNetworks_(networkState, expanded)]]"
               on-tap="onKnownNetworksTap_">
             Known networks
           </paper-button>
         </div>
       </div>
     </div>
   </template>
   <script src="network_summary_item.js"></script>
 </dom-module>