Simple refactoring - remove outdated page index

chrome/browser/resources/chromeos/login/screen_locally_managed_user_creation.html

 <div class="step hidden" id="managed-user-creation">
   <div class="step-contents">
     <div id="managed-user-creation-intro" class="step-no-logo">
       <div id="managed-user-creation-marketing-intro"
           class="marketing">
         <img src="chrome://theme/IDR_SUPERVISED_ILLUSTRATION_START">
       </div>
       <div class="below-marketing">
         <div class="page-title" i18n-content="createManagedUserIntroTextTitle">
         </div>
@@ skipping 64 matching lines @@
           <button id="managed-user-creation-flip-photo"
               class="custom-appearance"
               i18n-values="title:flipPhoto"></button>
           <button id="managed-user-creation-discard-photo"
               i18n-values="title:discardPhoto"></button>
           <button id="managed-user-creation-take-photo"
               i18n-values="title:takePhoto"></button>
         </div>
       </div>
     </div>
-    <div id="managed-user-creation-created-1" class="step-no-logo" hidden>
+    <div id="managed-user-creation-created" class="step-no-logo" hidden>
       <div class="marketing">
         <img src="chrome://theme/IDR_SUPERVISED_ILLUSTRATION_DONE">
       </div>
       <div class="below-marketing">
         <div>
-          <div id="managed-user-creation-created-1-text-1"
+          <div id="managed-user-creation-created-text-1"
               class="page-title"></div>
-          <div id="managed-user-creation-created-1-text-2"></div>
-          <div id="managed-user-creation-created-1-text-3"></div>
+          <div id="managed-user-creation-created-text-2"></div>
+          <div id="managed-user-creation-created-text-3"></div>
         </div>
       </div>
     </div>
     <div id="managed-user-creation-error" hidden>
       <img alt class="error-icon" src="chrome://theme/IDR_TECHNICAL_ERROR">
       <div id="managed-user-creation-error-title" class="error-title"></div>
       <div id="managed-user-creation-error-text"
           class="error-message-paragraph"></div>
       <div>
         <button id="managed-user-creation-error-button"
@@ skipping 18 matching lines @@
         <div class="managed-user-creation-manager-name"></div>
         <div class="managed-user-creation-manager-email"></div>
       </div>
     </div>
     <div class="password-block" hidden>
       <input class="managed-user-creation-manager-password" type="password"
           i18n-values="placeholder:createManagedUserManagerPasswordHint" />
     </div>
   </div>
 </div>