remove unnecessary code

packages/app/src/client/services/PageContainer.js

@@ -53,7 +53,6 @@ export default class PageContainer extends Container {
       tocHtml: '',
       isLiked: false,
       isBookmarked: false,
-      isSubscribing: false,
       seenUsers: [],
       seenUserIds: mainContent.getAttribute('data-page-ids-of-seen-users'),
       countOfSeenUsers: mainContent.getAttribute('data-page-count-of-seen-users'),
@@ -121,7 +120,6 @@ export default class PageContainer extends Container {
       this.retrieveSeenUsers();
       this.retrieveLikeInfo();
       this.retrieveBookmarkInfo();
-      this.retrieveSubscriptionStatus();
     }
 
     this.setTocHtml = this.setTocHtml.bind(this);
@@ -305,17 +303,6 @@ export default class PageContainer extends Container {
     return this.retrieveBookmarkInfo();
   }
 
-  async retrieveSubscriptionStatus() {
-    const res = await this.appContainer.apiv3Get('/page/subscribe', { pageId: this.state.pageId });
-    this.setState({ isSubscribing: res.data.subscribing });
-  }
-
-  async toggleSubscribe() {
-    const bool = !this.state.isSubscribing;
-    await this.appContainer.apiv3Put('page/subscribe', { pageId: this.state.pageId, status: bool });
-    return this.retrieveSubscriptionStatus();
-  }
-
   async checkAndUpdateImageUrlCached(users) {
     const noImageCacheUsers = users.filter((user) => { return user.imageUrlCached == null });
     if (noImageCacheUsers.length === 0) {