Get revision questions --partial commit

src/components/revise/Revise.tsx

@@ -22,7 +22,7 @@ export const Revise: React.FC = () => {
             window.alert("Failed to get questions");
             console.log(e);
         });
-    })
+    }, []);
 
     return <section className={styles.revisePage}>
         { progressState === 'QUESTION' && <div>

src/components/shelf-details/ShelfDetails.tsx

@@ -13,7 +13,7 @@ import { ReactComponent as ShareIcon } from '../../assets/icons/share.svg';
 import { ReactComponent as DeleteIcon } from '../../assets/icons/delete.svg';
 
 import { PopoverOptions } from "../popover-options/PopoverOptions";
-import { MobileShelfWord, ShelfWord } from "../../shared/models/shelf";
+import { MobileShelfWord } from "../../shared/models/shelf";
 import { MobileUser } from "../../shared/models/user";
 
 export const ShelfDetails: React.FC = () => {