diff --git a/src/utils/strings.ts b/src/utils/strings.ts
index 34375aabc0..beb9f31ddd 100644
--- a/src/utils/strings.ts
+++ b/src/utils/strings.ts
@@ -14,8 +14,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { memoize } from "lodash";
-
 /**
  * Copy plaintext to user's clipboard
  * It will overwrite user's selection range