Start reading cancel read: move logic to backend

front/src/BookForm.vue

@@ -72,7 +72,6 @@ async function onStartReadIconClick() {
   }
   if (data.value.read) {
     data.value.read = false
-    putUnreadBook(props.id)
   }
 }
 

front/src/BookListElement.vue

@@ -86,17 +86,12 @@ async function onUserBookStartRead() {
 
 async function userBookStartRead() {
   const res = await putStartRead(props.id)
-  if (!res.ok) {
-    res.json().then((json) => (error.value = json))
-    return
-  }
-  const resp = await putUnreadBook(props.id)
-  if (resp.ok) {
+  if (res.ok) {
     currentStartReadDate.value = today
     isRead.value = false
     isWantRead.value = false
   } else {
-    resp.json().then((json) => (error.value = json))
+    res.json().then((json) => (error.value = json))
   }
 }