Settings: Internet: Remove stale CSS breaking cr-dialog formatting

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

 <link rel="import" href="../settings_shared_css.html">
 
 <!-- Common styles for Internet settings. -->
 <dom-module id="internet-shared">
   <template>
     <style include="settings-shared">
       cr-network-icon {
         -webkit-padding-end: var(--settings-box-row-padding);
       }
 
       iron-icon.policy {
         -webkit-margin-end: var(--cr-controlled-by-spacing);
       }
 
       paper-input-container {
         --paper-input-container-input: {
           color: var(--paper-grey-600);
           font-size: inherit;
           font-weight: 400;
         };
         margin-bottom: 0;
         margin-top: -9px;
       }
 
-      .button-container {
-        align-items: center;
-        display: flex;
-      }
-
-      .button-container paper-button {
-        /* Align text edge with trailing margin (12px button padding) */
-        -webkit-margin-end: -12px;
-        /* 8px spacing between highlight edges. */
-        -webkit-margin-start: calc(12px + 8px);
-      }
-
       .settings-box.indented {
         -webkit-margin-start: var(--settings-box-row-padding);
       }
 
       .settings-box.stretch {
         align-items: stretch;
       }
 
       .title {
         font-size: 107.69%;  /* 14px / 13px */
         font-weight: 500;
       }
     </style>
   </template>
 </dom-module>