fix lint

src/features/library/inspect/MarkBoardInspect.vue

@@ -286,7 +286,6 @@ function inspect() {
   background-color: #5c69f6;
 }
 .all-zero-unselective-button {
-  height: v-bind(buttonHeightForSelective);
   border-radius: 10px;
   padding: 7px;
   background-color: #4db9ff;

src/features/student/inspect/MarkBoardInspect.vue

@@ -286,7 +286,6 @@ function inspect() {
   background-color: #5c69f6;
 }
 .all-zero-unselective-button {
-  height: v-bind(buttonHeightForSelective);
   border-radius: 10px;
   padding: 7px;
   background-color: #4db9ff;