pc 삭제 기능 추가

src/repositories/myRepository.js

@@ -81,6 +81,18 @@ const myRepository = {
     const { rowCount } = await pool.query(query, values);
     return rowCount > 0;
   },
+
+ async deleteCombinationById(combinationId) {
+  const query = `
+    UPDATE combinations
+    SET owner_id = NULL
+    WHERE id = $1
+  `;
+  const values = [combinationId];
+
+  const { rowCount } = await pool.query(query, values);
+  return rowCount > 0;
+}
 };
 
 export default myRepository;